the world of arbitrage calls this arbitrage. there are other, more pure, arbitrages - but this is very mainstream one. you are buying the stock at the market

the world of arbitrage calls this arbitrage. there are other, more pure, arbitrages - but this is very mainstream one. you are buying the stock at the market price, while you think it will be worth the offer price - there's a risk that it blows up. risk arbitrage. (not to be confused with garbitrage)