Beating The Gun
  
An early 1950s film noir, in which a hard-bitten L.A. cop, played by an aging Humprey Bogart, investigates the death of an Olympic sprinter, who is killed when someone replaces a starter pistol with a real gun.
Okay...actually, its slang term used when a trader is able to properly time the market.
You own stock in a company that most people have never heard of, but which has a big contract to provide plastic cup holders for a large car manufacturer. News breaks that the auto maker had terrible sales for most recent quarter. You immediately know that the price of your shares will eventually tank, since bad sales for the automaker means bad sales for the cup holder company. You quickly sell your shares before most of the rest of the market figures out the connection between the two companies. You just beat the gun.
There's a distinction here between beating the gun and insider trading. Insider trading is making moves before the general market because you are illegally using non-public information. Beating the gun is just timing the market well by quickly reacting to events.
Related or Semi-related Video
Finance: What is program trading?14 Views
Finance a la shmoop what is program trading? okay well watch two episodes of
Big Bang Theory if you first watch one episode of Keeping Up with the [Man and woman watching TV]
Kardashians deal alright no different kind of program trading, program trades
in a Wall Street sense are run by a computer program, hence the catchy name
and it's also called the black box like a program kicks out that if the S&P 500
is down 0.3 percent in an hour and the US dollar has risen relative to the
pound and goog is outperforming the tech index and the moon is in the seventh
house and Jupiter is aligned with Mars then short a million shares of GE like
that would be something that the box would tell you or something like that
and there are a ton of weird mathy things behind the rationale for each of [Math formulas appear]
these trades some of it makes sense to normal people but most of it needs three
PhDs in math and physics and other stuff to translate rationally
well the dangerous thing here about program trades is that usually there is
no human involved when they execute a trade that is it's just computers
talking to other computers but thankfully computers never have glitches [Computer chip blowing off steam]
right they never have mistakes and things generally always run smoothly
when computers are involved right well this is a really smart way to manage
your retirement money just give it all to a black box and assume the guys who
wrote the algorithm knew what they were doing or maybe not [Hacker using a PC]
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