Data Definitions - V | CRSP - The Center for Research in ...
On NASDAQ, volumes of after-hours trades are included in the current day, while the trades or quotes are included the next day. Therefore, it is possible to have bid/ask or missing price quotes paired with nonzero volumes. Trades on all exchanges connected to NASDAQ's composite pricing network and all late trades are included in the volume.
DA: 58 PA: 3 MOZ Rank: 93