使用警語:中文譯文來源為 Google 翻譯,僅供參考,實際內容請以英文原文為主
Operator
Good afternoon, and welcome to the First Quarter Hawaiian Electric Industries, Inc. Conference Call. (Operator Instructions) Please note this event is being recorded.
I would now like to turn the conference over to Cliff Chen, Treasurer and Manager of Investor Relations. Please go ahead.
Clifford H. Chen - Treasurer and Manager of IR & Strategic Planning
Thank you, Phil, and welcome, everyone, to Hawaiian Electric Industries' First Quarter 2017 Earnings Conference Call. Joining me this morning are Connie Lau, HEI President and Chief Executive Officer and Chairman of the Boards of Hawaiian Electric Company and American Savings Bank; Greg Hazelton, HEI Executive Vice President and Chief Financial Officer; Alan Oshima, Hawaiian Electric Company President and Chief Executive Officer; and Rich Wacker, American Savings Bank President and Chief Executive Officer; as well as other members of senior management. Connie will provide an overview, followed by Greg who will update you on Hawaii's economy, our results for the first quarter and our outlook for the remainder of the year. Then we will conclude with questions and answers.
In today's presentation, management will be using non-GAAP financial measures to describe the company's operating performance. Our press release and webcast presentation materials, which are posted on HEI's Investor Relations website, contain additional disclosures regarding these non-GAAP measures, including reconciliations of these measures to the equivalent GAAP measures.
Forward-looking statements will also be made on today's call. Actual results could differ materially from what is described in those statements. Please refer to the cautionary note regarding the forward-looking statements disclosure accompanying the webcast slides, which provide additional information on important factors that could cause results to differ. The company undertakes no obligation to publicly update or revise any forward-looking statements, including EPS guidance, whether as a result of new information, future events or otherwise.
I'll now turn the call over to our CEO, Connie Lau.
Constance Hee Lau - CEO, President, Director, Chairman of Hawaiian Electric Company Inc and Chairman of American Savings Bank FSB
Thank you, Cliff, and aloha to everyone. Both our operating companies, Hawaiian Electric and American Savings Bank, delivered first quarter financial results in line with our full-year expectations and the guidance we provided last quarter. At the utility, we continue to be leaders in the transformation to clean energy and are making significant grid upgrades to become more renewable-ready and to increase resilience and reliability. As of the first quarter 2017, we achieved an energy portfolio powered by over 26% renewable resources and are expected to exceed the 2020 RPS goal of 30%. At the bank, we're off to a strong start and had excellent deposit growth, increased net interest income and higher net interest margins along with improved operating efficiency.
Turning to recent utility development. We are waiting for the PUC's decision on our Power Supply Improvement Plan, which outlined a detailed 5-year plan charting the near-term actions that will provide a foundation to meet Hawaii's 100% renewable goal by 2045. On April 24, Hawaii Electric Light and the consumer advocate filed a stipulated procedural schedule in the Hawaii Electric Light 2016 test year rate case, subject to PUC approval. This includes an evidentiary hearing at the end of July 2017. On April 28, the consumer advocate filed its statement of position, and an interim decision is expected in August 2017.
In other developments, in April 2017, Hawaiian Electric completed negotiations for the third of 3 utility-scale solar facilities on Oahu with NRG Energy, which acquired the project following the bankruptcy of the prior developer last year. The 3 power purchase agreements are subject to PUC approval. The facilities are targeted to come online in 2019 and would get us 3 percentage points closer to our 100% renewable goal on Oahu and at pricing lower than originally contracted with the prior developer. The project's total 109.6 megawatts at a weighted average price of $0.108 per kilowatt hour, including state tax credits, less than the cost of our fossil fuel energy.
Hawaiian Electric continues to lead the nation in the adoption of distributed private solar power, and to date, approximately 16% of all customers have PV systems, nearly 20x the national average. In April, the PUC approved Hawaiian Electric's proposal to transfer to the customer grid supply program the available capacity from the net energy metering applications that had been submitted prior to the October 2015 cutoff but had been subsequently withdrawn or canceled. This would add approximately 20 megawatts of capacity for customer grid applications, which could allow another approximately 2,800 private rooftop solar systems under the customer grid supply program that replaced our closed retail NEM program.
In our efforts to encourage the electrification of transportation in our state, we participated in a highly successful promotional partnership with Nissan North America, which made available to our utility customers special rebates on the Nissan Leaf. This helped local Nissan dealerships to nearly double their sales in the first quarter, up from the first quarter in 2016. On April 27, we announced that Nissan was extending its offer for Hawaiian Electric customers through June 30 of this year. We are working with other auto manufacturers interested in creating similar campaigns.
Following a PUC-approved partnership, Hawaiian Electric Company and Stem tested nearly 1 megawatt of intelligent energy storage systems deployed at 29 commercial customer sites on Oahu. The successful operation of this aggregated energy storage marks a major milestone in a first-of-its-kind pilot project showing the ability to connect many customers' energy storage units with the utility to provide dual value, savings for participating customers and better grid operations for the utility.
In April, the PUC also approved Hawaiian Electric's pilot program for customers with special medical needs to apply for a discounted electric rate. Up to 2,000 customers dependent on life support equipment or increased heating or cooling due to a medical condition may save up to $20 a month. This program would be effective from April 1, 2017, and run for a 2-year trial.
And in order to provide more customer solutions, the company began beta testing of its mobile outage application on Oahu and intends to go live later this year with an application after the successful launch of its outage map in the first -- the fourth quarter of 2016. This is all part of the company's plan to provide more customer engagement and options.
In recent legislative developments, on April 28, Tom Gorak was not confirmed by our Hawaii State Senate as a PUC Commissioner. Governor Ige is expected to appoint a new interim commissioner.
I'll now ask Greg to cover Hawaii's economy, our financial results and outlook for the company.
Gregory C. Hazelton - CFO and EVP
Thanks, Connie. Hawaii's tourism industry, a significant driver of Hawaii's economy, continues to grow, setting records in both visitor spending and arrivals for the first quarter of the year. Visitor expenditures increased 10.4% and arrivals increased 3.1% compared to the same period last year. The state's 2.7% unemployment rate in March 2017 was lower than the prior year's rate of 3.1% and the national rate of 4.5% in March 2017.
Hawaii's real estate market continued to show strength in 2017 as median sale prices for single-family residential homes and condominiums on Oahu increased 3.5% and 2.6%, respectively, over the first quarter of 2016. The median sales price for single-family homes on Oahu in March was $752,000, up 3.7% from last year. According to the University of Hawaii Economic Research Organization's report dated May 5, 2017, Hawaii's economic outlook remains favorable for continued growth, although it may be a less rapid pace than in recent years. And although construction still remains very active, it has begun to taper.
As shown on Slide 5, first quarter 2017 GAAP earnings per share was $0.31 compared to $0.30 per share in the first quarter of 2016. Excluding the merger and related LNG contract termination costs, first quarter 2016 core EPS was $0.33, with Q1 consolidated core net income $1 million lower than the prior year.
As shown on Slide 6, HEI's GAAP consolidated ROE for the last 12 months was 12.5%, primarily due to the merger termination fee. Excluding merger-related transaction adjustments, HEI's core consolidated ROE was 9.4%, with ROE contributions of 7.8% from the utility and 10.4% from the bank.
On Slide 7, core utility earnings were $21.5 million in the first quarter of 2017 compared to $26.7 million in the first quarter of 2016. The most significant net income drivers were the $5 million net revenue decline largely due to the expiration of the 2013 settlement agreement which recorded Oahu RAM revenues beginning January 1 for the years 2014 through 2016. The period in which cash reflecting RAM revenues is collected did not change as a result of the settlement agreement and have always been aligned to the June 1 to May 31 periods, and hence, the expiration of the 2013 settlement agreement has had no impact on cash collections in 2017.
In addition, depreciation expense was higher by $1 million after tax due to increased utility investments for customer reliability and the integration of more renewable energy. O&M expenses were lower by $1 million after tax as the first quarter of 2016 included higher-than-expected Power Supply Improvement Plan expenses of $2 million after tax. The first quarter of 2017 included additional environmental reserves of $1 million after tax for preexisting issues.
Slide 8 shows the utility's GAAP ROEs for the last 12 months ended March 31, 2017. The consolidated utility GAAP ROE was 7.8% excluding merger-related transaction adjustments. The consolidated utility core ROE was 7.9%. The lag between our allowed ROE of 9.8% and our actual ROE is driven largely by our election to stay out of rate cases for 6 years and our reliance on our decoupling mechanisms.
Regarding these mechanisms, on April 27, the PUC issued an order related to outstanding items from the 2015 decoupling order. The order requires establishment of specific performance incentive mechanisms related to reliability and customer service. We'll be required to file proposed tariffs for the performance incentive mechanisms and sample calculations within 30 days.
The order also provides guidance for interim recovery of costs, offset by related benefits, for major projects completed in between general rate cases through a major project interim recovery mechanism. In addition, it indicated that in pending and subsequent rate cases, the PUC intends to require all fuel expenses and purchased energy expenses be recovered through an appropriately modified energy cost adjustment mechanism rather than through base rates, and we'll consider adopting processes to periodically reset fuel efficiency measures embedded in the energy cost adjustment mechanism to account for changes in the generating system.
Our current rates for Oahu, Hawaii Island and the to-be-filed Maui rate case during the summer will do 2 things. First, it will reset our base rates to recover the cost of investments we have been making for reliability and resilience of our grid, including the integration of greater amounts of renewable energy. And in addition, it will reset the baseline on target revenues for the decoupling mechanism going forward. In general, we should be able to earn closer to our allowed return, reducing our ROE lag after adjusting for structural items.
We estimate that our year-end 2016 actual ROE of 8.1% versus the allowed ROE of 9.8% was reduced by the following: approximately 50 basis points of structural items, which include nonrecoverable items such as incentive compensation, advertising and charitable contributions; also, approximately 110 basis points for items in excess of what is recovered through RAM revenues, largely due to higher plant additions and O&M that we have not received recovery of through RAM revenues due to the RAM revenue cap limiting annual increases to GDPPI; in addition, approximately 50 basis points of lag due to no return on pension regulatory assets above what was in the last test year rate case from 6 years ago. The company has not been recovering on the full net periodic pension cost, which we've had to fund into an external trust which has been contributing to this ROE lag. Excluding structural items, this creates 160 basis points of ROE lag, which we hope to address in the upcoming rate cases.
On Slide 9, at the bank, net income for the first quarter of 2017 was $15.8 million, $3.1 million higher than the first quarter of 2016 and $0.4 million lower than the fourth or linked quarter. Compared to the first quarter of 2016, the $3.1 million increase was primarily driven by $3 million of after-tax higher net interest income, mainly due to growth in commercial real estate and consumer loan portfolios as well as the deployment of our strong deposit growth into our investment portfolio. Compared to the linked fourth quarter of 2016, the $0.4 million decrease was primarily driven by the following on an after-tax basis: $1 million higher net interest income driven by higher yields on our investment portfolio and growth in our consumer portfolio and $1 million lower noninterest expense. These increases were offset by -- on an after-tax basis by $1 million higher provision for loan losses, including additional reserves for a commercial real estate relationship in the first quarter of 2017 and $1 million lower noninterest income primarily due to lower mortgage banking income as a result of a reduction in residential mortgage refinancing activity.
Turning to Slide 10. American delivered solid profitability metrics in the first quarter. We achieved a return on assets of 98 basis points, on track to exceed our 2017 target of 90 basis points. Our net interest margin was 3.68%, higher than our guidance range due to overall higher yields on interest-earning assets. Overall, the bank continues to maintain robust deposit growth, strong capital levels and a straightforward community banking business model.
On Slide 11, our net interest margin of 3.68% in the first quarter of 2017 was 9 basis points higher than the linked quarter. Our interest-earning asset yield increased 8 basis points from the linked quarter primarily due to increases in investment and loan portfolios, and our liability cost of 20 basis points decreased by 2 basis points as we reduced our higher-costing borrowings.
On Slide 12, total loans as of the quarter ended included growth in the residential and consumer loan portfolios. However, the reduction in our exposure to national credits, a loan payoff connected with the completed construction project and the resolution and payoff of prior nonperforming commercial loan position contributed to 1.2% annualized decline in our loan portfolio for the first quarter of 2017. However, we expect to meet our target of low, mid-single-digit growth for the year.
Our deposit growth has been consistently strong at 9.1% annualized for the first quarter of 2017. Our stickier core deposit growth was even higher at 11.4% annualized for this quarter. Low-cost deposits have funded our investment growth, resulting in higher net interest income. In addition, higher yields on our loans have also contributed to overall higher net interest income of $1.8 million pretax compared to the linked quarter. Noninterest income of $15.1 million was $1.3 million lower than the linked quarter, driven primarily by the decline in mortgage banking activity.
Overall, as we said last quarter, credit quality remains sound as a result of prudent risk management capabilities and the healthy local economy. Our residential portfolio remains very clean. Consumer unsecured credit quality is in line with expectations for the year, and the commercial and commercial real estate portfolios are stable with improving trends. Provision for loan losses was $2.4 million higher than the linked quarter primarily due to reserves for commercial real estate -- for a commercial real estate relationship.
Our net charge-off ratio of 29 basis points for the first quarter of 2017, 11 basis points lower than the linked or fourth quarter, largely due to charge-offs of specific commercial credits in the fourth quarter. Net charge-offs were above our target range of 18 to 23 basis points due to commercial loan charge-offs which are lumpy in nature. Nonaccrual loans as a percentage of total loans receivable held for investment decreased to 41 -- 0.41% compared to 0.49% at the end of the linked quarter, a decline of nearly $4 million. The allowance for loan losses was 1.19% of outstanding loans at $56 million for the quarter end compared to 1.17% at the end of the linked quarter and 1.13% as of the prior year-end.
Slide 14 illustrates American's continued attractive asset and funding mix relative to our peer banks. American's March 31, 2017, balance sheet is compared to the last complete available dataset for our peers which is as of December 31, 2016. 100% of our loan portfolio was funded with low-cost core deposits versus the aggregate of our peer banks at 86%. In the first quarter, total deposits increased by $126 million or 9.1% annualized while maintaining a very low cost of funds of 20 basis points, 27 basis points lower than the median for our peers.
In the first quarter 2017, American paid $9.4 million in dividends to HEI, and American remains well capitalized at March 31, with a leverage ratio of 8.5%, tangible common equity to tangible asset ratio of 7.8% and total capital ratio of 13.6%. We -- today, we are reaffirming HEI's 2017 earnings guidance range of $1.55 to $1.70 per share as there are no changes to the guidance range for the utility and bank at this time.
Connie, back to you. Connie? I'll complete the summary. In summary, our utilities continue -- will continue its expansion of our renewable energy portfolio and grid modernization efforts to increase our resilience and reliability while working towards achieving Hawaii's 100% clean energy goal. Our bank will continue to focus on deepening customer relationships to drive balance sheet and income growth.
On Wednesday, our board maintained our quarterly dividend of $0.31 per share, continuing our uninterrupted dividend payments since 1901. The dividend yield continues to be attractive at 3.7% as of yesterday's market close. HEI, Hawaiian Electric and American Savings Bank will continue to move forward providing long-term value for our customers, community, employees and shareholders.
And now we look forward to hearing your questions.
Operator
(Operator Instructions) The first question comes from Chris Turnure from JPMorgan.
Christopher James Turnure - Analyst
Can you give us some color on the situation with the commissioner that was not approved for his seat, just kind of what might have went on in the background there and why you think that might have happened? And then remind us whether the commission can make decisions with only 2 members or not.
Alan M. Oshima - CEO of Hawaiian Electric Company, President of Hawaiian Electric Company and Director of Hawaiian Electric Company
This is Alan Oshima. I'll start with the last part of the question. Yes, the commission can make decisions with 2 commissioners. I will not speculate as to why the confirmation did not proceed. I know that there was a lot of discussion about it throughout the session, and I just can't speculate why certain members voted against and others voted for.
Christopher James Turnure - Analyst
Okay. And then, in your opinion, do you think that this would impact the timing of the interim rate decision, even though they can vote with 2 commissioners? Is there anything else that we might be missing there that would impact that at all?
Alan M. Oshima - CEO of Hawaiian Electric Company, President of Hawaiian Electric Company and Director of Hawaiian Electric Company
We have seen no indication that it would. As I said, the commission can operate with 2 signatories, 2 commissioners. And over the year -- 2 years, Chair Iwase has increased staffing at the commission to be able to be more responsive to the large number of applications that have been filed. So we don't see any indication that things would slow down, notwithstanding, right now, not knowing who the interim appointment may be.
Christopher James Turnure - Analyst
Okay. And then, Greg, you, I think, kind of referenced this in your prepared remarks. But the impact of the interim decision and the kind of parameters that feed into that rate increase versus the final, can maybe you go over those again? And just kind of walk us through how those 2 would differ from a perspective of what you're recording in earnings besides, obviously, your opinion of what would happen versus what you're requesting.
Gregory C. Hazelton - CFO and EVP
So we haven't had an interim decision. I think you may be referring to my discussion of the decoupling order, which is relative to the decoupling mechanisms which generally seem to be constructive, removing fuel cost from base rates and putting them through the energy -- the ECAC mechanism that we have, which is a very timely update for fuel adjustments. And the mechanism allows for true-up of our generation-related costs that contribute to the calculation of the ECAC as appropriate, and the mechanism also allowing for recovery of capital expenditures between rate cases in a specific mechanism that would be moved out of the RAM calculation specifically, which, as you recall, the RAM has a cap on it. So we view that as a constructive order relative to the decoupling mechanisms.
Christopher James Turnure - Analyst
But if we just look at the rate cases that are filed right now, the full general rate cases, and we think of about what is going to actually flow into your bottom line kind of midyear or late this year when the interim rates are effective for that, how can we think about the components of that step in your earnings versus what would actually be in the final order? Are there things that are not eligible for being put into interim rates that are eligible for the final rates, for example?
Constance Hee Lau - CEO, President, Director, Chairman of Hawaiian Electric Company Inc and Chairman of American Savings Bank FSB
No -- this is Connie. Whatever is in the interim rates -- the standard on what can be included or not doesn't depend on whether it's an interim or it's a final, but the difference between an interim or a final is that the interim can be granted on a probable entitlement basis. And so what you'll see coming in throughout this year is, in August, we might expect an interim decision from the commission that could give us some interim rates, assuming that there is probable entitlement. And that would be for Hawaii Electric Light, which, of course, as you know, is one of the smaller utilities on the Big Island. And then for our large utility on Oahu, that interim would be expected very late in the year, in the December time frame.
Christopher James Turnure - Analyst
Okay, got you. That's kind of what I expected. And in the past, the practice of the commission has been to grant you a pretty, I guess, healthy interim step versus your overall rate. And I would assume you would book a rate there at the interim level that is your -- whatever you've been granted in the interim as opposed to your estimate of what the final outcome would be because it's all eligible to be trued up in the end.
Constance Hee Lau - CEO, President, Director, Chairman of Hawaiian Electric Company Inc and Chairman of American Savings Bank FSB
Yes, that's correct. If we received an interim increase, we would start looking at that interim rate. As you know, it's been quite a while since we've had a rate case or an interim decision, so this is a new commission.
Operator
Our next question comes from Charles Fishman from Morningstar.
Charles J. Fishman - Equity Analyst
Just -- Greg, just big picture, if you would, for me. I mean, going back to your prepared comments, you have 200 -- roughly 200 basis points of lag. And if I understood you correctly, what you're saying is the 160 basis points are structural, and that implies that, that's your target is to reduce that 160 basis points through this process as much as you can. You'll probably already -- always have 40 basis points just because of the expenses that can't get allocated or whatever charitable deductions, things like that -- or charitable contributions or other things like that. Is that the correct way to look at that? Can you comment?
Gregory C. Hazelton - CFO and EVP
Yes. We used a little bit different terminology. We considered the structural as those items that are unlikely to be recovered and haven't traditionally been recovered in a rate case process, the disallowances of charitable contributions and advertising costs, for instance. So we consider those the structural items. So as you...
Charles J. Fishman - Equity Analyst
And that's 40 basis points (inaudible) roughly?
Gregory C. Hazelton - CFO and EVP
Yes. In aggregate, for 2016, we reconcile that as 50 basis points of structural items, meaning that our real opportunity for ROE, if -- had we fully performed and had we had not other lag items, would have been a 9.3%. So that was our opportunity. And then the items -- the other items, we expect to address during the rate case, such as increased O&M and plant additions that were above the RAM cap. I did mention the pension contributions that we've had to make, that our pensions -- net periodic pension costs were set in a rate case 6 years ago. And consequently, we are under-collecting for those in this interest rate environment, and we've had to make contributions externally. So that's been invested capital into an external trust which we're not earning a return on, and that should also be addressed through this rate case. And that, in total, we'd estimated for -- as we reconciled 2016, about 160 basis points of ROE lag that can be addressed through the rate case. In 2016, we had some benefits on the other side as well. We had interest rate savings on debt that was refinanced at lower interest costs, so we had some offsets which will also be addressed during the rate case.
Charles J. Fishman - Equity Analyst
But the goal -- okay. The goal then is to -- management's target, your target, would be to get to a 9.3% consolidated utility ROE, by whenever?
Gregory C. Hazelton - CFO and EVP
Yes, that would be the -- again, that's predicated on a couple of things. The allowed ROE will also be addressed in the rate case. So we're currently at 10%, which is a weighted average across the 3 utilities. So -- or I'm sorry, we're at 9.8% across the 3 utilities on a weighted average basis. That will be reevaluated as part of the cost of capital process in the general rate cases. So that will establish the cap, the allowed and then you have -- you deduct the structural items, which are the disallowances, and that will set our opportunity to earn. The other elements there, assuming that we get a full recovery of our revenue requirements through the general rate cases, we would have the ability to earn up to that. So for 2016, that would have been 9.3%. In any event, we anticipate, through the rate case process, getting closer to our allowed ROE.
Operator
(Operator Instructions) Our next question comes from David Frank of Corso Capital Management.
David Frank - Managing Partner
Question -- and I think you just answered it, but could you tell me what the earned ROE range is assumed in your utility guidance for this year of $1.17 to $1.27? Is it -- I guess it's around 7.6%.
Gregory C. Hazelton - CFO and EVP
Well, we haven't actually provided specific guidance on that. You could back into it using our EPS for the years. But we haven't -- we are -- we did report our -- for the first quarter at 7.8%. And yes, the one thing affecting our actual ROE for 2017 is the impact of the RAM revenue recognition issue, which will continue on into next quarter as well. And I think we've provided some detail on that in the supplemental slides in terms of the annual impact. So we anticipated that the RAM mechanism adjustments this year would result in a loss of -- on a pretax basis, of $25 million in revenues. That's a net number, and that's shown on Slide 22 in our appendix slides. And that would be $14 million after tax, nearly $0.14 EPS. So that will impact our achieved ROE for 2017, which we'd expect would be in the 7% to mid-7% range.
Constance Hee Lau - CEO, President, Director, Chairman of Hawaiian Electric Company Inc and Chairman of American Savings Bank FSB
I might also call your attention to Slide 23, which we had put together to be helpful in understanding when interim rate increases might come in relative to when RAM mechanisms would operate.
David Frank - Managing Partner
Great. And just a quick question on the sort of 50 basis points of earnings -- under-earnings due to charitable contributions and other items. I mean, maybe I misunderstood this, that's very charitable of you, but is there a scenario upon which you don't or are not required to spend that nondeductible money and could actually boost your ROE by 50 bps if you so choose to?
Constance Hee Lau - CEO, President, Director, Chairman of Hawaiian Electric Company Inc and Chairman of American Savings Bank FSB
That's correct. Those are discretionary contributions on our part just as they are for most corporations. We believe that it's very important for us to take a leadership role not only in our business community but across our communities. And particularly in Hawaii, where we are island communities, it's quite important that all businesses support the community.
Operator
Our next question comes from Jackie Bohlen from KBW.
Schalise Nicole Vancura - Assistant Analyst
This is actually Schalise Vancura on for Jackie. I just have a couple of questions for Rich. Was the decline in mortgage banking income driven by a seasonal slowdown? Or were there MSR markets impacting the line item?
Richard F. Wacker - CEO, President and Director
Yes. No, the decline was mostly contraction. The decline year-over-year is mostly margin rates on the gain on sale, so volume was about the same on the sales of mortgages. The decline sequentially was principally from sort of seasonal decline in the market and the refinances really shrinking based on rates ticking up.
Schalise Nicole Vancura - Assistant Analyst
Okay. And you had great deposit growth in the quarter. Were there any key drivers for this?
Richard F. Wacker - CEO, President and Director
Just great execution by our team.
Schalise Nicole Vancura - Assistant Analyst
Okay, that's fair.
Richard F. Wacker - CEO, President and Director
Yes. It's been something we've been focused on for quite a while. And I think you've seen pretty sustained good performance on that, and it's accelerated recently. That gave us the chance, as Greg mentioned, to bump things into the investment portfolio with really good timing last quarter. So we got nice rates on what we are able to add to the portfolio, so that's going to help NIM as we go through the year.
Schalise Nicole Vancura - Assistant Analyst
Okay. And then with that, are you seeing any pressure with the March rate increase on deposit costs at all in the -- just from your customers?
Richard F. Wacker - CEO, President and Director
So far, we're good. I think you've seen that most of our growth has been in core deposits, the vast majority of core deposits and operating funds. So, so far so good.
Schalise Nicole Vancura - Assistant Analyst
Okay. And then just the last quick one. Did premium amortization changes between 4Q and 1Q drive any of the expansion in the security yields?
Richard F. Wacker - CEO, President and Director
Yes. It was a big contributor. So we were up 9 quarter-over-quarter, 8 of it was NIM. We've got about 3 of improvement in the rate on the portfolio between investments and loans, and then that was offset by some difference in the unusuals and loan fees and stuff between the quarters. So a big help, and that's the wildcard in future quarters, is where those -- where the rates are and what happens to the FAS 91.
Operator
(Operator Instructions) This concludes our question-and-answer session. I would like to turn the conference back over to Cliff Chen for any closing remarks.
Clifford H. Chen - Treasurer and Manager of IR & Strategic Planning
Thank you, Phil. And we thank every participant on the call, and we wish everyone a great weekend.
Operator
The conference has now concluded. Thank you for attending today's presentation. You may now disconnect.