How do you determine the Market Cap for a company such as Yahoo!?

Question

The Market Cap for Yahoo! Inc. is 36.94B. How is this determined? What formula did they use to get this figure?

Does it involve the assets, liabilities and such? If so, what is the exact formula to get that figure of 36.94B?

Answer 1

It is figure out by taking the stock price and multiplying it by the total number of outstanding shares.  You can get both figures from any web site.  Here's the link to get Yahoo's outstanding shares - http://finance.yahoo.com/q/ks?s=YHOO