Zweig-DiMenna, a veteran Wall Street hedge fund, is warning clients of a potential 15% annualized decline in the S&P 500. The cause: a “toxic cocktail” of rising consumer-price inflation colliding with an economy that refuses to slow down.
In a client newsletter, strategists Michael Schaus and Matthew Finkelstein cite 50 years of data showing that when inflation accelerates alongside strong growth, the S&P historically delivers a negative 15% annualized return.
Central to the warning is the firm’s proprietary inflation indicator, which surged to a reading of 72. The last time it hit comparable levels was in 2022, 2018, and 2012, years that brought significant market turbulence. In 2022 alone, the S&P fell roughly 19%.
The bond market also flashes red. The 10-year Treasury yield sits around 4.6%, just 80 basis points above the latest CPI reading-a historically razor-thin premium. Zweig-DiMenna estimates yields need to climb to roughly 5.8% to close the gap, which would rattle equities and raise borrowing costs across the board.
The warning arrives amid persistent inflationary pressures from geopolitical tensions, energy price volatility, and stronger-than-expected growth-a mix that leaves the Federal Reserve with no clean policy exit.
The firm, founded in 1984 by legendary investor Martin Zweig, relies on quantitative signals and historical analogs, lending institutional weight to this bearish call. For equity-heavy portfolios, the message is clear: reduce exposure now, or risk a grinding, multi-month drawdown.