A quasi-experimental study was designed to investigate the possibility that people's optimism is reduced if they experience a specific form of negative affect, namely, anxiety. The level of optimism held by two groups of English students toward a range of life events was examined. Students taking examinations, the experimental group, were in an anxious state. Students who had completed their examinations, the control group, were less anxious. Those in the anxious group were less optimistic about the likelihood of both negative and positive events happening to them than were those in the control group. They were also less optimistic about the likelihood of events happening to others and of events happening to them in comparison with others. It was concluded that negative affect in general, and anxiety in particular, may have a global effect upon optimism: It may reduce optimism toward a broad range of judgments.