This paper finds that the majority of stock price movements remain unexplained after controlling for both public and private information. This suggests that economists' inability to explain asset price movements is the result of either noise or naive asset pricing models.

We provide evidence on anchoring biases in insider trading using a stock's 52-week high. When stock prices are close to their 52-week highs, insiders are reluctant to purchase stocks and willing to sell them. Similarly, when stock prices are far from the 52-week highs, they are willing to buy...

I find evidence of valuable private information in the Chinese stock market. First, Chinese actively managed stock mutual funds outperform passive benchmarks including market, size, value, and momentum factors. Most funds appear to have skill, and much of that skill consists of stock-picking...

Are high–frequency traders (HFTs) informed? To address this question, we examine HFTs' activity in the call auction environment, where speed-related trading is limited and signal processing capacity becomes more relevant. To model the call market, we consider the Kyle (1989) rational...