Real-world arbitrage often involves a limited number of large financial intermediaries (e.g. dealers, hedge funds) with price impact. I study a multi-period model of imperfectly competitive arbitrage, in which supply shocks generate price di fferences between two identical assets traded in...

Many arbitrage strategies are dominated by a few large arbitrageurs who recognize their price impact. I model arbitrageurs as imperfectly competitive intermediaries facilitating risk-sharing between two clienteles of competitive investors. I show that in the presence of market power, i)...

I study how (VaR-based) financial constraints affect liquidity and welfare under different structures of the arbitrage industry. When capital is spread across numerous competitive arbitrageurs, financial constraints may impair their ability to provide liquidity, lowering other investors'...