Trading volume: the only dimension besides price
beginner
Automated material · TradeAlmanac editorial deskDraft prepared by a language model from our stored data; not reviewed by an editor.
Price says at what level the two sides agreed. Volume says how much trading happened while they did. The second dimension adds important context to the first.
What high volume means
That many securities took part in the move, so agreement between the sides was reached repeatedly. A move on high volume usually reflects a change of mind among many participants.
What low volume means
That a small number of trades moved the price. Such a move reverses easily and is especially characteristic of illiquid securities — Blue chips and market tiers: how groups of securities differ.
Spikes
A sharp rise in volume usually relates to an event: results, a corporate decision, inclusion in or exclusion from an index. Finding the event is more useful than interpreting the spike — Company news: what actually changes a valuation.
What volume does not show
Direction. Every trade has a buyer and a seller, so "buying volume" and "selling volume" are the same number.
The practical use for an investor
Assessing liquidity before placing an order and sizing a position — Portfolio liquidity risk: how long an exit would take.
Draft prepared by a language model from our stored data; not reviewed by an editor.
Model: claude-opus-5
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