JPMorgan Cautions High Investor Leverage Could Threaten Stocks in Q4

High levels of investor positioning and leverage have returned to the market, creating a potential headwind for equities in the fourth quarter, according to a new analysis from JPMorgan.

Positioning and Leverage Rebound

In a note published Thursday, JPMorgan strategist Nikolaos Panigirtzoglou wrote that "Elevated equity positioning and leverage have re-emerged... posing some challenge to equities into Q4." This marks a reversal from the end of July, when the bank had observed that a deleveraging phase had unwound most of the market's previous excesses.

According to the bank's analysis, several measures of market positioning and leverage have rebounded over the past two months. JPMorgan's broader positioning indicator is reported to have peaked in September, reaching levels previously seen in January and in August 2025.

Key Risk Indicators

JPMorgan highlighted several specific areas of concern where investor bullishness and borrowing have increased:

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• U.S. Equity Futures: Leverage through these instruments is reportedly back near its highs for the year.
• Short Interest: Short positions in the SPY ETF are bottoming out after hitting a record low in early September, while short covering in semiconductor ETFs appears mostly complete, limiting a potential source of buying pressure.
• Momentum Traders: These market participants have started to rebuild long positions in indices like the Nasdaq, Kospi, Taiwan, and Nikkei.
• Margin Debt: The bank flagged leverage in margin accounts as the biggest vulnerability, noting that it remained "very elevated" in August with minimal change through the summer.

Tech Sector Fundamentals Remain Supportive

Despite these macroeconomic headwinds, JPMorgan believes the technology and artificial intelligence sectors still have fundamental support. The note pointed to positive underlying trends, including rising memory prices and higher capital spending forecasts for hyperscale data center operators.

Additionally, the bank observed that prices for AI computing capacity are holding firm, suggesting continued robust demand that could underpin performance in that segment of the market even if broader indices face pressure.