套利者
套汇商

[ noun ]
someone who engages in arbitrage (who purchases securities in one market for immediate resale in another in the hope of profiting from the price differential)
<noun.person>

arbitrageur \arbitrageur\ n.
someone who engages in {arbitrage}; i. e. one who purchases
securities in one market for immediate resale in another in
the hope of profiting from the price differential.

Syn: arb, arbitrager.
[WordNet 1.5]