Thank you, Phil, and welcome, everyone. This is Matt Funke with Southern Missouri Bancorp. The purpose of our call today is to review the information and data we presented in our quarterly earnings release dated Monday, July 24, 2017, and to take your questions. We may make certain forward-looking statements during today's call, and we refer you to our cautionary statement regarding such statements contained in the press release.
So thanks, again for joining us. I'll begin by reviewing the preliminary results highlighted in our quarterly earnings release. The June quarter is the fourth quarter of our 2017 fiscal year.
We earned $0.49 diluted in the June quarter, that is the same result from the June quarter a year ago and it's down $0.04 from the $0.53 diluted that we earned in the linked March quarter. The current period includes some nonrecurring items, which we'll touch on as we move through the areas of the income statement. Some were positive and some were negative and the onetime expenses did outweigh the onetime benefits. The linked March quarter had some larger nonrecurring benefits, which we discussed on last quarter's call and we'll try to highlight those as we move through the income statement also.
On the balance sheet, the asset growth in the June quarter was primarily attributable to the mid-June acquisition of Capaha Bank. Total assets were up $212 million, and included loan growth of $172 million. Capaha made up $152 million of that loan growth, and they were also the primary reason for most other asset category increases. Compared to June 30, 2016, gross loans were up $264 million and if you take out the $152 million from Capaha, we'd show an increase of $112 million or just under 10% for the year. The investment portfolio continues to grow more slowly outside of the increase attributable to Capaha for the quarter. The portfolio was up about 4% over the last 12 months.
Deposits were up $183 million in the June quarter, with $167 million of that attributable to Capaha. Our public unit deposits, which has been a source of growth for us over this fiscal year, they were actually down this quarter on an organic basis although the Capaha acquisition contributed about $12.5 million in new public unit money. Similarly, while we've grown brokered deposits during the fiscal year, we did not utilize them in the June quarter, although Capaha add about $18 million in that funding source remaining at June 30. For the year to date, our deposits are -- or for the year, our deposits are up $335 million, with $167 million coming from Capaha and $58 million coming from our legacy use of traditional brokered funding. We did see good growth in public unit deposits this year with some of our public unit customers moving from our swept repurchase agreement into deposit accounts which utilize our reciprocal brokered deposit arrangements.
Equity was up during the quarter with the issuance of stock in the Capaha acquisition and also the completion of our aftermarket offering of common stock, both in mid-June. Shares outstanding increased by more than 1.1 million but our average shares outstanding during the quarter increased far less because both issuances were late in the quarter.
Moving over to the income statement. We include a comment each quarter on our fair value discount accretion on loans and the smaller premium amortization on time deposits from our Peoples Bank acquisition. That acquisition is now 3 years old and the recurring accretion will really not be too consequential moving forward. In the current quarter, however, that item jumps back up to $409,000, almost double where we were in the linked March quarter. June quarter in the prior fiscal year concluded at a similar level to this quarter, and the September quarter of our current fiscal year had an even higher level. Each of these instances where it increased like that is the result of resolution of particular purchase credit impaired loan. While we expect the impact of discount accretion from Peoples to continue to move lower in the coming quarters, we may still seek some isolated increases as we continue to resolve a few individual impaired credits.
Our net interest margin in the fourth quarter was 3.82%, of which 12 basis points was the result of that fair value discount accretion. Another 8 basis points would be attributable to recognition of interest income on the payoff of loans, which we had carried previously in nonaccrual status.
In the year-ago period, our margin was 3.73%, of which 13 basis points resulted from the Peoples Bank fair value accretion. So on what we would look at as a core basis then, our margin was up 3 basis points comparing the June 2017 quarter to the June 2016 quarter. Our core asset yield is up 6 basis points and our core cost of funds is up 2.
Compared to the linked quarter when our net interest margin was 3.64% and we had 6 basis points of benefit from the purchase accounting related to the Peoples acquisition, this would indicate that our core margin is up 5 basis points. But we did note on our call last quarter that the March quarter is slightly negatively impacted in how we annualize our quarterly figures. So we actually haven't seen quite that much improvement on a sequential basis if you would calculate that on a daily calculation.
Noninterest income as a percentage of our average assets annualized was 75 basis points, that is unchanged from the same quarter a year ago, but we did identify in the June quarter last year that we had about $143,000 in nonrecurring benefits, primarily related to the sale of an interest in a low-income housing -- a low-income housing tax credit partnership. This quarter was the best quarter of our fiscal year on a core basis. It's up from the figure we posted in the linked March quarter if you exclude $343,000 in onetime benefit in the March quarter, which primarily reflected a bank-owned life insurance benefit. The rebound we saw on a core basis from the March quarter is somewhat typical for this time of year.
Noninterest expense was up compared both to the same quarter a year ago and compared to the linked quarter. We had $536,000 in expense attributable to M&A activity, after a much smaller amount in the last couple of sequential quarters and none at the year-ago period. As a percentage of average assets, noninterest expense increased to 2.82%, but if you exclude those M&A expenses, a write-off of fixed assets related to flooding at one of our locations, intangible amortization and a seasonal swing in our provision for off balance sheet credit exposure, we calculate that our operating interest expense as a percentage of average assets is up 13 basis points from the year-ago quarter and up 4 basis points from the linked quarter.
Items including legal, data processing, advertising and compensation were impacted by M&A. We also saw a shift to a more significant provision for off balance sheet credit exposure as compared to recovery on that item in the same quarter a year ago, and we also had some charges to write down the carrying value of foreclosed real estate.
Nonperforming loans were down a bit in dollar terms to $2.8 million. They declined further in percentage terms to 20 basis points on our total loans, down 5 basis points from where we were at March 30 at 0.25% and from $5.6 million or 0.49% at June 30, 2016. We noted in our call last quarter that we've restored almost $2.5 million to accrual status in several purchase credit impaired loans which were performing according to terms, and that's the primary reason for the decline year-to-date.
Nonperforming assets at June 30 were $6.3 million, declining at about the same amount as our NPLs and they extended our lowest levels since 2011 in percentage terms. As a definitional matter, we consider nonperforming assets to be our foreclosed and repossessed property, nonaccrual loans and loans 90 or more days past due.
Net charge-offs for the quarter were just 1 basis point annualized and for the full year, charge-offs were 5 basis points. Last year, for the full fiscal year, our average was 9 basis points.
The allowance as a percentage of our gross loans was down to 1.10% at June 30, 2017. The acquired Capaha Bank loans will be subject to fair value accounting instead of an allowance. We provisioned $383,000 in the June quarter, that's up slightly from where we were in the linked quarter, and it's down more significantly from the year-ago period as charge-offs were much lower and we had a lower level of nonperformers.
Our effective tax rate for the quarter was 28.9%, down from 31% in the same period of the prior year, but up from the 27% in the linked quarter -- 27.0% in the linked quarter. The bank's formation at the beginning of this fiscal year of a real estate investment trust has benefited our effective tax rate year-over-year while the current quarter includes some nondeductible expenses related to M&A while the linked quarter included some onetime benefit related to bank-owned life insurance which allowed the effective rate to be lower during that quarter.
That concludes my prepared remarks on the financials. I'll introduce our CEO, Greg Steffens, to provide his thoughts on our performance and to update you on some of our strategic initiatives.