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Noun: arb  aa(r)b
Usage: informal
  1. 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)
    "The arb made a fortune exploiting price differences between international markets";
    - arbitrageur, arbitrager

Derived forms: arbs

Type of: bourgeois, businessperson

Encyclopedia: Arb