This paper proposes a dynamic information diffusion model that explains the lead-lag reaction of stock prices resulting from the interaction of price trends and implied price risk (IPR). Consistent with our model's predictions, we construct a zero investment underreaction portfolio (overreaction...

By studying the only mandatory pre-IPO market in the world – Taiwan's Emerging Stock Market (ESM), we document that pre-market prices are very informative about post-market prices and that the informativeness increases with a stock's liquidity. The ESM price-earnings ratio shortly before the...