・Stock volume measures how many shares change hands over a given time frame. ・High volume typically signals strong liquidity and tighter bid-ask spreads. ・Low volume can lead to wider spreads, sharper ...

Volume is the number of shares of a stock that have changed hands over a certain period of time, typically one day. Stocks with higher volumes have more investors interested in buying or selling them.

Last month, a mid-cap biotech stock you’d been watching jumped 8% in a single session. The volume bar on your chart looked like a skyscraper compared to the usual trading activity. Was that a buying ...