Two stock traders are in a bank, when, suddenly, armed robbers burst in, waving guns and yelling for everyone to freeze.
While several of the robbers take the money from the tellers, others line the customers, including the two stock brokers, up against a wall, and proceed to take their wallets, watches, and other valuables.
While this is going on, one of the stock brokers jams something into the other stockbroker’s hand.
Without looking down, the second stockbroker whispers: “What is this?”
The first stockbroker : “It’s the $100 I owe you!”