This research explored the role of anticipated negative feelings in the observed disparity between buying and selling prices for the same endowed object. We assumed that anticipated negative reactions to losses deter people from trading an endowed object and therefore psychological variables that attenuate the emotional response to negative events should further reduce the price disparity between buyers and sellers. In 3 studies, we tested whether factors that either decrease concern about negative feelings (e.g., positive mood, framing of the transaction as involving no action) or increase the anticipated negative reaction to failure to act (e.g., priming errors of omission) further eliminate the disparity between buying and selling prices. These studies provide a novel conceptualization of the endowment bias and, more generally, illustrate the role of anticipated negative feelings in decision making.