There is no question that arbitrage is legal because the arber is simply exploiting price differences in the market, effectively buying and selling (bets) as any trader does. There is nothing illegal about this. However, it is understandable that bookmakers are not fond of arbers. read more
Arbitrage trading is not only legal in the United States, but should be encouraged, as it contributes to market efficiency. Furthermore, arbitrageurs also serve a useful purpose by acting as intermediaries, providing liquidity in different markets. read more
Arbitrage comes when there is a price discrepancy between 2 or more entities. There is nothing wrong in taking any of these prices individually, so there is no reason for arbitrage to be illegal. Arbitrage actually just makes the market more efficient by bringing it back into line. read more