This research examines how time pressure influences bidding behavior in experiment auctions. The studies reported herein investigate how time pressure systematically impacts individual trading of an endowed object by looking at the disparity between buying and selling prices for that object. Study 1 tests whether the effect of time pressure eliminates the disparity between selling and buying prices. In Study 2, transaction demand is employed to see whether sellers and buyers are more sensitive to changes in the item (amount of work). In Study 3, sellers and buyers access information of differing valence in the task. In Study 4, the framing of the reference price is manipulated to moderate the endowment effect. These studies indicate that under time pressure, endowment bias is reduced and, more generally, elucidate the role of trading behavior in decision making.