U.S. Margin Trading Balances Hit $1.415 Trillion in May, Up 53.7% Year-over-Year

According to MarketWatch, U.S. margin trading balances reached $1.415 trillion in May, surging 53.7% compared to the same month last year, according to FINRA data released on July 13. The growth rate of approximately 54% exceeds the 40% threshold historically associated with market overheating. Similar rapid increases in margin trading preceded the dot-com bubble, the 2008 financial crisis, and the 2022 downturn.

Analysts warn that borrowed funds may be concentrated in recently surging AI-related and semiconductor stocks. Nationwide's chief market strategist noted that leveraged trading in margin, options, and leveraged ETFs tends to concentrate in specific sectors, potentially signaling a shift from investor optimism to speculative behavior.