BofA Market Breadth Gauge Approaches Sell Signal Not Seen Since January

A key Bank of America gauge of global stock market breadth is approaching a sell signal for the first time since January, as the vast majority of equity indices are now trading in "overbought" territory. The signal suggests the market's rally is becoming stretched, even as investors continue to pour capital into most asset classes.

Breadth Indicator Nears Critical Level

According to a note from BofA strategist Michael Hartnett, the bank's "Breadth Rule" shows that 82% of global equity indices are trading above both their 50-day and 200-day moving averages. A formal sell signal is triggered when this figure crosses 88%.

The last time the indicator flashed a sell signal was on January 28, according to the bank. Hartnett noted that China, India, and Brazil are the only major markets that are not currently registering as overbought.

Investor Positioning and Fund Flows

Despite the warning sign, weekly flows data showed continued demand across nearly every asset class. Hartnett described the current investor stance as "long stocks, long investment-grade bonds, short government bonds and short the U.S. dollar," a position that bets on policymakers successfully capping Treasury yields.

For the week, BofA reported the following inflows:

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• Bonds: +$17.7 billion
• Cash: +$9.2 billion
• Stocks: +$9.2 billion
• Gold: +$7.3 billion (the largest inflow since October 2025)
• Crypto: +$3.2 billion (the largest inflow since October 2025)

However, U.S. stocks saw their first outflow in five weeks, losing $4.4 billion. This was offset by a $4.6 billion inflow into technology funds, the largest in four weeks. In fixed income, investment-grade bonds attracted $7.7 billion, while high-yield bonds saw a modest $700 million outflow.

Potential Catalysts and Sector Views

Hartnett suggested that the recent underperformance of AI-centric stocks like the "Magnificent Seven" and semiconductor firms versus AI-adopting sectors like healthcare and financials will not reverse until the 30-year Treasury yield falls below 5%.

He also identified two potential catalysts that could shift markets to a "risk-off" posture in the coming months: a renewed slide in President Trump’s economic approval ratings and a potential resolution to the conflict in Iran.