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This paper provides evidence that managers adjust firm advertising, in part, to attract investor attention and influence short-term stock returns. First, I show that increased advertising spending is associated with a contemporaneous rise in retail buying and abnormal stock returns, and is followed by lower future returns. Second, I document a significant increase in advertising spending prior to insider sales and a significant decrease in the subsequent year. Additional analyses suggest that the inverted V-shaped pattern in advertising spending around insider sales is most consistent with managers' opportunistically adjusting firm advertising to exploit the temporary return effect to their own benefit.
