Red flag alert: Bank of America's Bull & Bear Indicator just flipped to a SELL signal.

Here's what's got traders talking—the index has rocketed to 9.3, marking its highest point since way back in February 2018. That's wild. We're talking one of the most extreme readings the market has seen this entire century.

When sentiment gauges spike this hard, it usually means one thing: the crowd's betting heavy in one direction. Whether that's a contrarian setup or a genuine warning? That's the million-dollar question traders are wrestling with right now. But when an institution like Bank of America's meter hits these levels, people take notice.