Wash

A "wash" describes a sharp, fast pullback in price that happens right after a stock or other instrument has been pushing higher. Picture a stock climbing steadily for several minutes, then suddenly dropping hard over a few seconds or a minute or two, before possibly resuming its climb. That sudden drop is the wash.

The mechanism behind it is usually a mix of profit-taking and fear. Traders who bought earlier in the move start selling to lock in gains, and once the price ticks down, other short-term traders and momentum-chasers see the drop and sell too, sometimes stopping out of positions automatically. This creates a cascade that looks much more violent than normal supply and demand would suggest, because it's driven by emotion and reflex rather than new information about the company or asset.

The nuance that trips people up is telling a wash apart from an actual trend reversal. A wash is meant to be temporary — the price "washes out" weak hands (traders with loose conviction or tight stop-losses) and then often continues in the original direction once the selling pressure is exhausted. But in real time, nobody can be certain whether a given drop is a wash that will recover or the start of a genuine reversal. There's no fixed size or duration that qualifies as a wash; it's a pattern recognized after the fact, based on how price behaves once it settles.

The term "wash" here has nothing to do with "wash trading" or the "wash sale rule," which are unrelated concepts involving artificial trading volume and tax loss rules, respectively. Confusing the two is a common beginner mistake given how similar the words sound.