Art Raschbaum
Analyst · FBR
Thank you, Noah. Good morning and thanks for joining us. During this morning's presentation, I'll begin with a review of the operating results and then I'll turn the call over to John Marshaleck, our CFO, to provide more detail on the financial results for the quarter, and I'll come back in and conclude with prepared remarks with some of the comments regarding market conditions.
At Maiden, we continue to benefit from our highly differentiated strategy of delivering stable returns and profitable operating performance by serving the non-catastrophe needs of our regional and specialty insurer clients with solid results for the quarter and for the first half of 2012.
In the quarter and for the 6 months, we continue to generate profitable underwriting performance, strengthened investment earnings, grew book value per share by 1.7% during the quarter and 7.2% in the first 6 months of the year, and maintained an operating return on equity of 9.9% for the first 6 months.
Operating income was $19.7 million or $0.27 per diluted share, a solid increase over $11.2 million in the second quarter of 2011. You may recall that last year's second quarter was impacted by frequency of severe weather-related losses in the U.S. And while our second quarter of 2012 operating income is essentially the same as our first quarter operating income, it's important to note that this quarter reflects the additional impact of $2 million of interest expense that's associated with the issuance of our 30-year senior notes in the first quarter. Strengthening investment earnings have helped to offset this incremental cost. Despite a challenging yield environment, we were able to increase our net investment income to over $20 million as we deployed cash into productive investments in the quarter with total investments up nearly 26%, to $2.4 billion, compared to the end of the second quarter last year.
As we've discussed in the past, we typically experience our largest quarterly premium volume in the first quarter, with subsequent quarters running a bit lower, reflecting some of the seasonality in our business. Similarly, we don't expect to see the same accelerated level of premium growth this year that we experienced in the recent past. You may recall that in 2011, a significant amount of our growth reflected a combination of the impact of our international acquisition late in 2010, the expansion of the AmTrust Quota Share to include hospital liability in 2011 and a full year of ACAC writings.
The second quarter and first 6 months of 2012 are very much in line with our expectations. Maiden's net written premium for the quarter totaled $412 million. That's down $25 million or 5.7% from the same period in 2011.
But importantly, last year included the nonrecurring $45.9 million income in unearned premium portfolio that was associated with the AmTrust hospital liability program. Absent that portfolio, our second quarter net written premium actually increased by $20.9 million or 5.4%, which reflects a healthy but more moderate growth rate.
Through the first 6 months, total net written premium was up $116.3 million from 2011 with total written premium of $1 billion or 13%. If we exclude the nonrecurring unearned premium portfolio from the 6-month comparative, premiums were up 19% or $162 million for the 6 months ended June 30, 2012, in comparison to the first 6 months of last year.
Looking at the recent written premium by operating segment, in our Diversified segment, which includes our U.S. platform Maiden Re, our international business and our non-interest ACAC Bermuda underwritten business, net written premium was down slightly from the prior year second quarter at $144 million versus $158 million in 2011.
For the first 6 months of 2012, net written premiums of $432.3 million reflect an increase of 3.7% or $15.4 million. Our U.S. operations generated very strong growth in 2011. And while that pace has moderated some, we continue to see strong deal flow. As we have commented in the first quarter, we have seen a bit more active interest in larger closure transactions from competition. And we've essentially let, what we feel are lower margin opportunities, go. Clearly, our business has to conform to the return requirements necessary for our business.
Our client retention levels remain over 90%. And as we typically do, we're seeing some growth in individual client relationships. We've seen some reduction in revenue in our International Insurance Services business and other Bermuda underwritten business, that reflects the general weakness in the European economy and the impact that, that has on our auto-centric underwriting performance. The IIS team is currently working on a number of new programs, which should benefit the continuing development of this business. Earned premium for the diversified portfolio is up significant from the prior year, reflecting the strong growth in 2011, which included the International Insurance Services portfolio acquisition and the strong growth at Maiden Re. Net earned premium of $403.6 million grew by $59.1 million or 17% from the first 6 months of 2011.
Net written premium at our AmTrust segment for the quarter reflects a year-on-year reduction as a result of the nonrecurring unearned premium portfolio transfer that we've already spoken about in the second quarter of 2011. Absent that nonrecurring transaction run rate, net written premium of $195.6 million reflects year-on-year growth of $25.1 million.
For the 6 months of 2012, net written premium of $421.6 million is up 22.9%, mostly reflecting the strong first quarter 2012 growth. AmTrust is continuing to benefit from the acquisition of its California workers' compensation platform as well as continued rate strengthening of its largest market segments. Net earned premium for the AmTrust segment totaled $167.8 million versus $136.3 million in the second quarter of 2011.
And for the first 6 months, net earned premium of -- for 2012 totaled $335.7 million versus $250.8 million and reflects the strong growth in 2011, significantly driven by the addition of the Hospital Liability business, as well as the expansion of AmTrust core business.
And then finally, in our ACAC segment for the quarter, net written premium totaled $72.4 million, up from $62.5 million in 2011. That growth reflects a combination of rate strengthening and selective expansion of the underlying portfolio. Through 6 months, the ACAC net written premium of $148.9 million is up from $126.5 million in the first 6 months of 2011. Earned premium for the quarter was $70.2 million and $136.3 million for the first 6 months of 2012 versus $61.2 million and $119 million in 2011.
Underwriting performance has improved versus the second quarter of 2011 with a combined ratio of 97.9%. Our results for the quarter remain somewhat above our combined ratio target level of 96%, and we continue to work diligently with our clients to improve profitability and to focus on the areas with the most return potential. I'll provide an overview of pricing a bit later. But briefly, we are seeing indications of price improvements in the primary market across many business lines. However, they have varying degrees and in cases such as primary commercial auto, we are seeing some regional inconsistencies in pricing trends.
Diversified segment combined ratio improved to 98.6% relative to the second quarter of last year, which was negatively impacted, again, by the high frequency of tornadoes and thunderstorms in the U.S. Results for the Diversified segment were largely impacted by our international insurance services German auto business, which performed at a higher-than-acceptable combined ratio for the quarter. We're working with our partners to implement underwriting and pricing changes, along with changes in the claim process, to bring this business more in line with our return criteria.
The AmTrust Quota Share segment reflects a combined ratio of 96.5% compared to 97.9% in the second quarter of 2011, essentially meeting our expectations for the segment. The ACAC Quota Share segment had a combined ratio of 96.3% in the first quarter versus 97.1% in the second quarter of 2011.
We believe that we're well-positioned to benefit from any improved pricing in the broader insurance environment and increased demand. We have made substantial progress in the quarter, investing cash and improving the earnings contribution from investment income despite the challenging investment environment.
And I'll now turn the call over to John to review second quarter financial results in a bit more detail. John?