Terminal Command for Stock Information [closed]

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I would like to have a command that gets me the value a stock closed at.

How can I do this?

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This is a pretty open ended question and not very specific, so I'm basically just thinking out loud here. Tou would have to write a command line program that took in a stock code and then went off to some kind of web service and fetched the appropriate value for that code.

So do you want something that just outputs to the terminal window (ie. "standard out")?
>stock AAPL
339.30

stock would be the name of the compiled binary.
The program takes in a single argument for the stock code. It send that code to a web service that provides pricing information, then parses the result and spites it back out.