Thank you, Doug. During the first quarter, we delivered a 3.7% annualized return on adjusted equity, which is satisfying given the chaos and disruption currently being experienced throughout the world attributable to the pandemic. Our underwriting results were solid for the majority of the first quarter, reflecting the strength of our business model, but our financial results were adversely impacted by unrealized net investment losses.
Our net premiums earned were $168 million, a decrease of 4% year-over-year. Since premiums earned are primarily a function of the amount and timing of net written premiums, I'll let Steve describe the decrease in premium writings this quarter in his remarks.
Our losses and loss adjustment expenses were $104 million, an increase of 18%. The company recognized $3 million of favorable prior year loss reserve development during the current period, which related to accident years 2010 and prior versus $22 million of favorable prior year loss reserve development a year ago. Our current accident year loss and loss adjustment expense ratio was 65.6%, which is literally unchanged from the full year ratio that we recorded for 2019.
Commission expenses were $21 million, a decrease of 3%. The decrease was primarily due to the decrease in earned premium. Underwriting and general administrative expenses were $47 million, a decrease of 2%. The decrease was largely the result of lower premium taxes and assessments, partially offset by higher information technology and bad debt expenses.
From a reporting segment perspective, our Employer segment had underwriting income of $1 million for the quarter versus $22 million a year ago, and its combined ratios were 99.5% and 87.2% during those periods, respectively. Our Cerity segment had an underwriting loss of $4 million for the quarter, which was consistent with its underwriting loss of a year ago.
Turning to investments. Net investment income was $20 million for the quarter, down 9%. The decrease was primarily due to a sharp increase in the amortization of bond premiums associated with our residential mortgage-backed securities, which was caused by a recent distortion of mortgage loan prepayment speed assumptions. At quarter end, our fixed maturities had a duration of 3.1 and an average credit quality of A+, and our equity securities and other investments represented 9% of the total investment portfolio.
We were unfavorably impacted by $43 million of net after-tax unrealized losses from equity securities and other investments, which are reflected on our income statement; and $29 million of after-tax unrealized losses from fixed maturity securities, which are reflected on our balance sheet. These unrealized investment losses were the primary driver of our 5% decrease in book value per share, including the deferred gain year-to-date.
Finally, during the quarter, we repurchased $43 million of our common stock at an average price of $37.17 per share, and our remaining share repurchase authority currently stands at just under $36 million.
And now I'll turn the call over to Steve.