Volume
Volume is the face value of the contracts traded over a period, in dollars: every contract is counted at its full $1 payout, regardless of the price it actually traded at. This is the figure behind every dollar amount on TickerTracker and the standard prediction-market convention. It measures how much market changed hands — activity and scale — not how much cash moved, which is always smaller (contracts × price) and depends on the odds. It is often called "trading volume." Volume is cumulative: once a contract has traded it counts forever, so the number only goes up. Not to be confused with open interest, which is what is currently held open.
Related terms
See it in live markets
Browse real prediction markets with volume, events, and activity.