Knowledge that Transforms

Arbitrage opportunities in markets for cryptocurrencies are well-documented. In this paper, we confirm that they exist; however, their magnitude decreased greatly from April 2018 onward. Analyzing various trading strategies, we show that it is barely possible to exploit existing price differences since then. We discuss and test several mechanisms that may be responsible for the increased market efficiency and find that informed trading is correlated with a reduction in arbitrage opportunities.

We exploit a unique experiment, where the intraday price moves of Indian IPO listings are restricted within a narrow band, to examine the consequences of price bands for stock prices, investor trading behavior, and stock market liquidity. Based on difference-in-differences estimations, we find that price bands lead to a significant reduction in the price variability of IPO stocks. The decrease in variability is accompanied by increases in post-IPO selling by individual investors, the price impact of trades, and IPO expected returns. Bid-ask spreads remain similar. The findings provide new evidence on the effects of intraday price bands on equity markets.