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Anecdotal and indirect empirical evidence suggest that excitement and market bubbles are intertwined, such that excitement not only arises during bubbles but may also help fuel them. We directly test the impact of excitement on bubbles in a bubble-prone experimental asset-pricing market . Prior to trading, participants are assigned to emotion inductions through video clips The results of fifty-five markets show larger asset pricing bubbles in magnitude and amplitude in the excitement treatment relative to a treatment of same valence and lower intensity ( calm ) and a treatment of similar intensity and opposite valence ( fear ).