Good morning, and thank you for joining our first quarter 2020 earnings call. Today, I'll provide the highlights of our financial results followed by an overview of the underwriting and market conditions that we are experiencing. Chris will then cover our financial results in more detail. I will finish with concluding remarks, and we will then open the call for questions.
We are living in very uncertain times, and our hearts go out to all those affected by the COVID-19 global pandemic. I would also like to take a moment to thank our employees for their hard work during this especially challenging environment. Our entire team has moved to remote working while continuing to run the business and creatively addressing our clients' needs. I have been enormously proud to see how the individuals and our company have responded.
Turning to our results. Third Point Re generated a net loss of $184 million, and our return on equity was a negative 13% for the first quarter of 2020. Our first quarter result was driven by a negative investment return of 7.3%, primarily due to the equity market volatility resulting from the COVID-19 pandemic. Our diluted book value per share at the end of the first quarter was $13.05, representing a decrease of 13.2% since year-end 2019.
Since quarter end, our investment portfolio has recovered a portion of the losses, having risen 3.5% in April, generating approximately $85 million of net investment income for the month. Our combined ratio for the first quarter was 97%, which included our current estimate of COVID-19 losses of $9.5 million or 6.5 percentage points on our combined ratio.
We reported a small benefit from favorable reserve development in the quarter. This is now our 15th quarter in a row with no prior year adverse reserve development. The COVID-19 underwriting losses that we recorded in the first quarter were driven primarily by contingency exposures or event cancellation as well as certain casualty, specialty and multiline quota share contracts. We will record our best estimate of losses related to COVID-19 as they are incurred by our cedents, and expect a continued effect in future quarters. That being said, the largest source of our estimated losses related to COVID-19, based on our current estimate estimates, is event cancellation, for which the majority of our expected losses for this line of business were recognized in quarter 1. It is important to note that the insurance industry's loss as well as our own related to COVID-19 are subject to a high degree of uncertainty given the unknown duration and severity of the pandemic.
Despite our overall loss, our capital position remains very strong and I am pleased to report our first quarter of underwriting profitability in Third Point Re's history, which is a testament to our talent underwriters, our expansion into property cat and other higher-margin business and reducing our writings and line of business that no longer fit with our revised underwriting strategy.
Now let me turn to an update on underwriting and current market conditions. The build-out of our property catastrophe portfolio continues according to plan, and we have added a number of new clients so far in 2020. As a result of improvements in market pricing and the repositioning of our portfolio, we expect to increase our expected margins from this line of business without increasing risk. There's a lot of market discussion and significant uncertainty as to how COVID-19 will flow through the property insurance and reinsurance markets, in particular, potential for losses resulting from business interruption from commercial property insurance. While we are not entirely immune to this issue, our property catastrophe portfolio has focused on clients writing personal lines, meaning we have less exposure to commercial property insurance. Our non-catastrophe business, which still represents the majority of our reinsurance premium, continues to show underwriting improvement. Since most of our business is pro rata, we are benefiting from both primary pricing trends and from an improvement in specific reinsurance contract terms and conditions. However, the pro rata nature of our business, also will result in contract by contract premium volume volatility resulting from the impact of COVID-19 on many of our clients' businesses. We continue to reposition the non-cat portfolio away from float generating low-margin contracts towards business, which offers increased profitability in improving market segments. And this shift in strategy is a driver in the reduction in premium in the first quarter. However, as we have stated many times, we have several large contracts, and in some cases, may not renew or may not -- or may renew in noncomparable periods, and thus would not try and extrapolate premium movements in any given quarter. Within our specialty business, we expect to see a significant reduction in credit risk exposed lines of business, in particular, mortgage reinsurance in the short term. The practical implications of the lockdowns in place in many countries make the origination of new mortgage loans difficult. While the effect of these actions will likely cause a material drop in new business production in the short term, it may provide opportunities for increased volumes of business improve terms once the COVID-19 crisis has abated. In other specialty lines we write, many of which are specialty catastrophe focused, we expect to see significant market impacts from COVID-19 and potential new opportunities with significant rate increases and improvements in terms and conditions.
Lastly, an area of our business that I'm excited about is our selective focus on strategic transactions, where we can combine our responsiveness, reinsurance capital, and in some cases, investment capital create long-term partnerships with rights to profitable future reinsurance premium. We have closed several transactions to date and believe our efficient operating model, combined with our skill set in both reinsurance and capital markets is a differentiating factor in our successful origination and execution of these transactions, which we expect will represent a growing proportion of our premium over time.
We believe that up to 10% of our volume for the 2020 underwriting year could come from these initiatives.
I will now hand the call over to Chris, who will discuss our financial results in more detail.