This paper introduces a new tool — the wavelet-variance estimator — that measures the fraction of trading activity at each investment horizon. We find substantial cross-sectional variation in horizons, even for stocks with the same volume, size, and liquidity. Moreover, the fraction of...

This paper uses wavelets to decompose each stock's trading-volume variance into frequency-specific components. We find that stocks dominated by short-run fluctuations in trading volume have abnormal returns that are 1% per month higher than otherwise similar stocks where short-run fluctuations...

How do arbitrageurs find variables that predict returns? If a predictor lasts 30 days or more, then a clever arbitrageur can use his intuition to get the job done. But, what's an arbitrageur supposed to do if a predictor lasts 30 minutes or less? An arbitrageur's intuition is useless if the...

This paper uses wavelets to decompose each stock's trading-volume variance into frequency-specific components. We find that stocks dominated by short-run fluctuations in trading volume have abnormal returns that are 1% per month higher than otherwise similar stocks where short-run fluctuations...

This paper develops a model showing why traders might use coincidences to identify promising investment opportunities that are worth investigating further. The model predicts that, if both National Semiconductor and Sequans Communications realize top-10 returns (i.e., the semiconductor industry...

Companies have overlapping exposures to many different features that might plausibly affect their returns, like whether they're involved in a crowded trade, whether they're mentioned in an M&A rumor, or whether their supplier recently missed an earnings forecast. Yet, at any point in time, only...

We estimate that passive investors held 37.8% of the US stock market in 2020. This value comes from studying the closing volumes of index additions and deletions on reconstitution day. 37.8% is more than double the widely accepted previous estimate of 15%, which reflects index-fund holdings but...

This paper uses transactions-level deeds records to examine how out-of-town second house buyers contributed to mispricing in the housing market. We document that out-of-town second house buyers behaved like misinformed speculators and drove up both house price and implied-to-actual rent ratio...

Suppose you are trying to prove to an outside investor, Alice, that you know about a profitable new way to pick stocks. It might seem like, if you do not have enough money to start trading on your own behalf, then you must reveal some information about how you pick stocks to prove that you can...