Michael Grasher
Analyst · SunTrust
Thank you, Janelle. For the second quarter of 2013, AMERISAFE reported net income of $7.6 million or $0.41 per share, compared to $3.4 million or $0.19 per share in the second quarter of 2012. On an operating basis, operating net income was $8.5 million or $0.45 per share in the second quarter of 2013 compared to $3.4 million or $0.18 per share in the second quarter of 2012, an increase of 150% year-over-year.
As Janelle mentioned, gross premiums written rose 12.1% from the year-ago quarter, attributable to $10.1 million growth in voluntary premiums written in the quarter. Though still positive at $3.7 million, audit and related adjustments declined year-over-year by $0.8 million.
Net premiums earned increased 17.6% from the year ago quarter, benefiting from the strong growth achieved in prior quarters. Meanwhile, net investment income totaled $6.6 million in the second quarter of 2013, roughly 1% above the second quarter of 2012. Average invested assets were $926.4 million in the quarter ended June 30, 2013, compared to an average of $873.2 million for the same period in 2012, an increase of 6.1%. The tax equivalent yield on our investment portfolio was 4.1% compared to 4.5% in the second quarter of 2012.
In the quarter, we experienced a realized loss on our investment portfolio of $1.3 million or $0.05 per share net of tax, compared to $0.1 million or $0.01 per share gain in the second quarter of 2012. The loss resulted from our investment committee's decision to impair 2 equity securities, which in sum totaled roughly $1.9 million in losses. Those losses were offset in part by realized gains taken of $0.6 million.
In total, revenue for the second quarter of 2013 was $87.5 million, up 14.2% from the year ago period. Our current accident year loss ratio for the quarter remained 73.2% compared to 76.5% a year ago. Our incurred loss and loss adjustment expenses totaled $56.8 million for the quarter, which included $3.2 million of favorable prior year development. This compares to loss and loss adjustment expenses of $56.7 million in last year's second quarter, which included $3.4 million of unfavorable prior year developments.
In total, our net calendar year loss ratio for the second quarter of 2013 was 69.3% compared to 81.3% for the second quarter of 2012.
Turning to expenses. The expense ratio increased to 24% from 22% in the same quarter a year ago. Total underwriting and other expenses increased 28.1% to $19.7 million. The 2013 second quarter expense components include: $5.7 million of salaries and benefits, $6.2 million of commissions and $7.8 million of underwriting and other costs. To provide a bit more granularity, the impact of the high severity loss impacted our contingent profit commission by $1.03 million, and the timing issue around the true-up of premium taxes contributed $1.2 million. Taken together, these 2 items generated 2.6 points of the expense ratio. We continue to anticipate our expense ratio, ultimately will track to more normalized levels as the year unfolds.
In total, our combined ratio was 93.8% for the second quarter of 2013 versus 103.8% for the same period in 2012, a remarkable improvement driven by the improved underwriting performance. With the improvement in the combined ratio, our underwriting results were a higher mix of the total pretax income. Consequently, we experienced an increase in our tax rate to 28.2%, up considerably from 14.5% a year ago and last quarter's 20.1%. For the 6 months, our tax rate was 24.1%. Operating return on average equity for the second quarter of 2013 was 8.7% compared to 3.7% for the second quarter of 2012. Book value per share at June 30, 2013, actually grew both sequentially and year-over-year. Book value per share now stands at $21.29, an increase of 6.6% from the second quarter a year ago and up modestly from last quarter's $21.20 book value.
In light of the current investment environment and legacy underwriting issues within the workers' comp industry, we are pleased by these results.
Finally, a few line item numbers that always hold relevance. Statutory surplus was $343.3 million; cash flow from operations remained strong at $59.4 million, up from $41.9 million in the second quarter of 2012. We continue to maintain excellent liquidity at the holding company with over $45 million of cash and cash equivalents. We paid our second quarterly dividend of $0.08 per share on June 26, 2013. And the Board of Directors on July 30 declared an $0.08 dividend to be paid on September 27, 2013, to shareholders of record as of September 30 -- as of September 13.
That concludes my prepared remarks on the financials. And I'll now turn the discussion back over to Allen.