'Buy the dip' works — but only a certain kind of dip. The measured, survivorship-free base rate draws the line for you.
“Buy the dip” is the most repeated advice in investing. Is it true? Measured across 8,352 US stocks, survivorship-free — mostly yes, but only for the right kind of dip. A record of what happened, not a prediction, and no stock is recommended here.
A modest pullback (roughly −5% to −30% from the recent high) in an otherwise strong name has historically resolved positively more often than the market baseline, with a better median forward return. A −60% collapse is a different animal — that's not a dip, it's a downtrend, and the odds flip.
The mistake beginners make is treating every red day the same. The data says the edge lives in shallow dips within an uptrend — pair the dip with a trend filter (is it still above its 200-day line?) and you're buying a statistically favourable range, not catching a knife.
Buying the dip isn't about nailing the exact low — that's a fool's errand. It's buying a favourable zone and sizing for the case where it keeps falling.
The measured base rate for this zone is below, and the full method is in the pullback buy-zones lesson. Odds, not hope.