Mario Rizzo
Executive Vice President and Chief Financial Officer at Allstate
Thanks, Tom. Turning to Slide seven. Let's dive deeper into the near-term results on our multifaceted approach to grow Property-Liability market share. As you can see in the chart on the left side of the slide, Property-Liability policies in force grew by 12.1% compared to the prior year quarter primarily driven by National General and growth in Allstate brand new business. National General, which includes Encompass, contributed growth of four million policies, and Allstate brand Property-Liability policies increased in the quarter driven by growth in homeowners and other personal lines.
Allstate brand auto policies in force declined slightly compared to the prior year quarter but increased sequentially for the second consecutive quarter, including growth of 111,000 policies compared to prior year, and as you can see by the table on the lower left. The chart on the right shows a breakdown of personal auto new issued applications compared to prior year. We continue to make progress in building higher-growth business models as we look to achieve leading positions in all three primary distribution channels.
The middle section of the chart on the right shows Allstate brand impacts by channel, which in total generated a 6.7% increase in new business growth compared to the prior year. Modest increases from existing agents, excluding new appointments, and a 31% increase in the direct channel more than offset the volume that would normally have been generated by newly appointed agents, as we pilot new agent models with higher growth and lower costs. The addition of National General also added 481,000 new auto applications in the quarter.
Let's turn to Slide eight to review Property-Liability margin results in the second quarter. The recorded combined ratio of 95.7% increased 5.9 points compared to the prior year quarter. This was primarily driven by increased losses relative to the historically low auto accident frequency experienced in the prior year quarter due to the pandemic. Increased losses were partially offset by lower pandemic-related expenses primarily shelter-in-place paybacks in 2020 as well as lower catastrophe losses. These are represented by the green bars in the combined ratio reconciliation chart on the lower left of the slide.
Shifting to the chart on the bottom right, we continue to make progress in reducing our cost structure. This enables improvement in the competitive price position of auto insurance and investments in marketing and technology, while maintaining strong returns. The total Property-Liability expense ratio of 24.7% in the second quarter decreased by 7.1 points compared to the prior year, again, driven by lower coronavirus-related expenses. This was partially offset by the amortization of purchased intangibles associated with the acquisition of National General, restructuring charges and a 0.7-point increase from higher investment in advertising.
Excluding these items, as shown by the dark blue bars, the expense ratio decreased by 0.4 points in the second quarter compared to the prior year period, decreased 1.7 points below year-end 2019 and 2.5 points below year-end 2018, reflecting continued progress in improving cost efficiencies. Claims expenses have also been reduced through innovations such as QuickFoto Claim, Virtual Assist and aerial imagery, which also improves the customer experience. These claim improvements are not reflected in the expense ratio but are in the loss ratio and also helped maintain margins.
Moving to Slide nine, let's discuss how our auto insurance profitability, which remains very strong and is still favorable to prepandemic levels despite pandemic-driven volatility. Allstate Protection auto underlying combined ratio finished at 91.8%. As you can see from the chart, the level remains favorable to 2017 through 2019 historical second quarter and year-end levels despite increasing by 9.4 points compared to the prior year quarter. The increase to the prior year quarter reflects a comparison to a period with historically low auto accident frequencies. The improvement relative to historical levels is driven by auto accident frequency remaining below prepandemic levels, partly offset by auto severity increases and competitive pricing enhancements.
To illustrate the pandemic-driven volatility, Allstate brand auto property damage gross frequency increased 47.3% from the prior year quarter but is 21% lower than the same period in 2019. Auto severity increases persisted relative to the prior year quarter and prepandemic periods across coverages, largely driven by the shift in mix to more severe, higher-speed auto accidents and rising inflationary impacts in both used car values and replacement part costs. The incurred severity increases are running higher than general inflation, which are reflected in the recorded combined ratio.
To counteract rising severity, we are leveraging advanced claim capabilities, predictive modeling, advanced photo and video utilization and deep expertise in repair process management to enable a scaled response to inflation and supply constraints. Targeted price increases will also be implemented, as necessary, to maintain attractive auto insurance returns.
Now let's shift to Slide 10, which highlights investment performance for the second quarter. Net investment income totaled $974 million in the quarter, which was $754 million above the prior year quarter, driven by higher performance-based income as shown in the chart on the left. Performance-based income totaled $649 million in the second quarter, as shown in gray, reflecting both idiosyncratic and broad-based valuation increases in private equity investments and, to a lesser extent, gains from the sales of real estate equity. Market-based income, shown in blue, was $3 million above the prior year quarter.
The impact of reinvestment rates below the average interest-bearing portfolio yield was mitigated in the quarter by higher average assets under management and prepayment fee income. Our total portfolio return in the second quarter totaled 2.6%, reflecting income as well as higher fixed income and equity valuations. We take an active approach to optimizing our returns per unit risk over appropriate investment horizons. Our investment activities are integrated into our overall enterprise risk-and-return process and play an important role in generating shareholder value. We draw upon a deep and experienced team of roughly 350 professionals to leverage expertise in asset allocation, portfolio construction, fundamental research, deal leadership, quantitative methods, manager selection and risk management.
While the results for this quarter were exceptionally strong, particularly for the performance-based investments, we managed the portfolio with a longer-term view on returns. At the right, we have provided our annualized portfolio returns over a three-, five-, and 10-year horizon. As disclosed in our investor supplement, our performance-based portfolio has delivered an attractive 12% IRR over the last 10 years, which compares favorably to relevant public and private market comparisons. Our performance-based strategy takes a longer-term view, where we seek to deliver attractive absolute and risk-adjusted returns and supplement market risk with idiosyncratic risk.
Moving to Slide 11. Protection Services continues to grow revenue and profit. Revenues, excluding the impact of realized gains and losses, increased 27.1% to $581 million in the second quarter. The increase was driven by continued rapid growth in Allstate Protection Plans and expanding marketing services at Arity due to the integration of LeadCloud and Transparent.ly, which were acquired as part of the National General acquisition.
Policies in force increased 15.5% to $147 million, also driven by Allstate Protection Plans and supported by the successful launch with the Home Depot in the first quarter. Adjusted net income was $56 million in the second quarter, representing an increase of $18 million compared to the prior year quarter driven by profitable growth at Allstate Protection Plans and profits at Arity and Allstate Identity Protection. Allstate Protection Plans generated adjusted net income of $42 million in the second quarter and $155 million over the past 12 months.
Now let's move to Slide 12, which highlights Allstate's attractive returns and strong capital position. Allstate continued to generate attractive returns in the second quarter with adjusted net income return on equity of 23.8% for the last 12 months, which was 5.8 points higher than the prior year. Excellent capital management and strong financial results have enabled Allstate to return cash to shareholders, while simultaneously investing in growth. We continue to provide significant cash returns to shareholders in the second quarter through a combination of $562 million in share repurchases and $245 million in common stock dividends.
We announced the acquisition of SafeAuto in June, leveraging National General's success in integrating companies to accelerate growth. The current $3 billion share repurchase program is expected to be completed in the third quarter. And yesterday, the Board approved a new $5 billion share repurchase authorization to be completed by March 31, 2023. This represents approximately 13% of our current market capitalization. This new authorization continues Allstate's strong track record of providing cash returns to shareholders and reflects, in part, the deployable capital generated by the sale of our life and annuity businesses.
Moving to Slide 13. It should be clear that Allstate is an attractive investment opportunity. When you invest in Allstate, you get ownership of a company with advanced capabilities and a clear strategy, delivering superior financial results relative to peers and the broader market. The table below shows Allstate across key financial metrics over the past five years compared to the S&P 500 and property-casualty insurance peers with a market cap of $4 billion or more.
As you can see by the four measures on the top, operating EPS, operating return on average equity, cash yield and total shareholder return, Allstate is consistently ranked in the top two or three amongst its peers. In the case of operating EPS and cash yield to common shareholders, Allstate is in the top 10 and top 15%, respectively, compared to the S&P 500. Moving down one row, Allstate's top line revenue growth relative to peers and the S&P 500 is in the middle of the pack. We are committed to accelerating top line performance through Transformative Growth and innovating protection, while continuing to deliver excellent financial results.
Moving down to the price-to-earnings ratio. Allstate is well below average, eight out of 10 P&C peers, and in the 10th percentile amongst the S&P 500. This is an attractive valuation given our market-leading capabilities, excellent returns, future growth prospects and commitment to accelerate growth.
Now let me turn it back over to Tom.