This list shows NYSE and Nasdaq stocks where today's or yesterday's volume was at least five times the 50-day average, excluding penny stocks and illiquid names, ranked by how far today's volume is above normal. Unusual volume is one of the earliest clues that something is happening: earnings, a takeover rumor, an analyst action or institutions building a position. A spike on a rising price points to accumulation; on a falling price, to distribution.
