Short interest in U.S. macro instruments has surged to levels not seen in more than three years, according to data provided by Goldman Sachs, increasing the potential for abrupt market rallies if bearish positions are rapidly closed out.
Goldman’s figures indicate that short exposure across U.S. macro products - a category that encompasses index and ETF positions - has risen sharply in recent weeks. Measured as a share of total gross market value within the bank’s Prime Book, short positioning now sits at its highest point since September 2022 and falls into the 93rd percentile over the last five years.
That accumulation of negative bets leaves market structure vulnerable to sudden repricing should investor sentiment shift. Traders at Goldman, including Ariana Contessa, caution that the current configuration of positioning could magnify volatility as crowded trades adjust.
“This market has proven it has the ability to move violently in both directions with dealers short gamma right now,” Contessa wrote.
Short gamma conditions typically mean that market makers face rising margin and hedging demands as prices move, which can force them to chase price trends and thereby amplify both rallies and selloffs. In the environment Goldman describes, the bank sees the larger risk skewed to the upside if accumulated short exposure begins to unwind.
“However, right tail (squeeze) risk at the index level is primed to be the most extreme,” Contessa added.
Goldman also notes some preliminary signs consistent with this dynamic. The bank pointed to recent episodes where more positive headlines around oil markets and developments tied to the Iran conflict coincided with buying pressure, suggesting that news flow can trigger rapid repositioning when positioning is crowded.
Hedge funds are a contributing factor in the setup. Goldman reports that gross leverage at hedge funds is near record highs, a situation driven in large part by ongoing shorting and hedging activity through macro products such as index futures and ETFs.
“Hedge funds’ gross leverage is essentially at an all-time high driven by continued shorting (hedging) via macro products,” Contessa said.
Taken together, the elevated short exposure across macro products, dealer short gamma and high hedge fund leverage form a market backdrop in which rapid, amplified moves - particularly to the upside - are a material risk if positioning reverses.