From Assets to Alpha: David Kostin on US Equities

Episode Summary

Executive Summary: David Kostin, retiring Goldman Sachs chief U.S. equity strategist, discusses market outlook, AI bubble concerns, and career reflections. He forecasts below-average S&P 500 returns over the next decade due to high valuations and concentration, but sees no AI bubble in public markets. He highlights healthcare, consumer, and AI beneficiaries as opportunities, while noting investors struggle with relative performance.

Main Topics: Market Outlook and Volatility (Priority: 5/5): Kostin discusses current market sentiment, volatility (VIX around 19), and the impact of Liberation Day. He notes a strong Q3 earnings season and a steady market recovery since April. AI Bubble Debate (Priority: 5/5): Kostin argues there is no AI bubble in public markets (NVIDIA's price and earnings both up 12x), but sees potential unsustainability in private markets due to reflexivity and vendor financing. Long-Term S&P 500 Return Forecast (Priority: 4/5): Kostin forecasts 3-10% total returns over the next decade (midpoint 6.5%), likely on the lower end due to high valuations and concentration. He cites historical comparisons (1999, 2021). Investor Challenges and Opportunities (Priority: 4/5): Only 29% of mutual funds beat benchmarks; hedge funds up 12% vs S&P 500's 17%. Opportunities in healthcare (cheapest in 30 years), consumer (middle-income stability), and AI revenue beneficiaries. Career Reflections and Changes in Capital Markets (Priority: 3/5): Kostin shares memories of his first day (1994), interactions with investors like George Soros and Warren Buffett, and the shift from asset-focused to alpha-focused strategies over 30 years. Advice for New Entrants (Priority: 2/5): Kostin advises understanding one's role in the broader business context and engaging with diverse clients (sovereign wealth, hedge funds, etc.) to develop variant perspectives.

Key Arguments: The AI bubble is not present in public markets because price and earnings growth have matched (e.g., NVIDIA up 12x in both), and valuations of top 10 stocks (30x earnings) are below historical peaks (40x in 2021, 50x in 1999). In private markets, AI capital availability may be unsustainable due to reflexivity (Soros' theory) and vendor financing, creating a potential bubble. Long-term S&P 500 returns will be below average (3-10% total return) due to high starting valuations (21x forward earnings), high margins, and market concentration, which increases expected volatility without compensation. Investors are underperforming because they reduced exposure after the April sell-off and missed the rebound; hedge funds are up 12% vs S&P 500's 17%. Opportunities exist in healthcare (cheapest relative valuation in 30 years), consumer (middle-income stability and tax reform benefits), and AI beneficiaries focused on revenue growth rather than cost-cutting.

Data Points: VIX level: 19 - Current volatility measure, in line with last five years Q3 earnings growth: 9% year-over-year - Broad-based earnings increase, not just Magnificent Seven NVIDIA price and earnings increase: 12-fold over 3 years - Price and earnings matched, indicating no public market bubble Top 10 stocks P/E: 30x - Current valuation vs 40x in 2021 and 50x in 1999 US IPOs in 2025: 55 deals >$25M - Compared to 280 in 2021 and 400 in 1999 Mutual funds beating benchmarks: 29% - Below typical 37% Hedge fund returns YTD: 12% - vs S&P 500's 17% S&P 500 forward P/E: 21x - Historically high, near 1999's 24-25x Long-term S&P 500 return forecast: 3-10% total return (midpoint 6.5%) - Below long-term average due to high valuations and concentration

Pivotal Quotes: "We are not in an AI bubble in the public markets. And I believe in the private markets, the availability of capital and the price is probably unsustainable, which one could take as a synonym for a bubble." — David Kostin: Explaining the distinction between public and private AI markets "The most frequently asked question from investors all over the world has been: Are we in an AI bubble?" — David Kostin: Highlighting the dominant investor concern "I think the important point for any business, and particularly Goldman Sachs, for a young person who's joining the firm, is to think about one's role and how that fits into the broader business environment." — David Kostin: Advice for new entrants to the workforce

Implications: Investors should expect lower long-term returns from U.S. equities and consider diversifying into healthcare and consumer sectors. The AI trade remains viable in public markets but caution is warranted in private markets. Active managers may continue to struggle in a concentrated market.