AAII Bulls Hit 46% — Is That a Sell Signal?

AAII Bulls at 46% — Time to Sell?

Not a hard sell signal, but the historical short-run expectancy turns negative here. It's a regime where chasing has below-average efficiency.

This week's AAII individual investor sentiment survey flipped back to a bull majority for the first time in months, with bulls at 46%. The neutral camp didn't drift — it jumped almost wholesale into the bull camp, after the market had already bounced off its lows. That's a classic late-capitulation pattern.

What the Backtest Says

EdgeFinder's scenario backtest tool finds 284 historical cases of 'AAII bulls > 45%'. The forward-return averages are illuminating:

• 1-day average: negative
• 1-week average: negative
• 1-month average: negative
• 6-month average: positive
• 12-month average: +7.6%

A positive 12-month average shouldn't surprise — markets drift up over long horizons. What's notable is that 7.6% is below the S&P 500's long-run ~10% average. So elevated bull sentiment leans slightly bearish in the short run, and below-average over a year out.

The Mirror Image: Bears Above 35%

Run the opposite scenario and the picture cleanly inverts. When bearish sentiment is above 35%, the 1-day, 1-week, 1-month, and 12-month average returns all look more attractive. The old 'be greedy when others are fearful' line shows up clearly in the data.

Read together, the two studies say something simple: crowd sentiment is most useful at the extremes. In the middle, it's noise.

What I'm Actually Doing

My stance is clear. I don't chase when the crowd has already piled in. But I'm not aggressively shorting either — backtests are averages, not guarantees. Practically, I size new long entries smaller and tighten risk on existing trades. Sentiment data alone doesn't drive the decision; combined with macro and technical context, it sharpens timing.

FAQ

Q: Does the conclusion strengthen if bulls go to 50% or 60%? A: Generally yes — more extreme bull readings have stronger short-run contrarian properties — but sample size shrinks at the tails, so statistical confidence has to be weighed alongside.

Q: Should I exit the market here? A: No. The backtest reports averages, and the dispersion across individual cases is wide. The honest read is 'chasing has below-average efficiency right now,' not 'sell.'

Q: How do you actually weight sentiment data in real trades? A: Never as a standalone signal. I use it as one input alongside trend, COT positioning, and macro data. The discipline is to avoid over-relying on any single indicator.