Some companies apparently have their shares listed in multiple exchanges. For example, I think that a company can be listed simultaneously in New York, London, and maybe even some Asian markets - is this correct?
What happens, hypothetically, if I want to buy all of the company's stock - can I do it in one exchange only, or would I need to be acting in each of the exchanges separately, first buying all the stock in New York, then moving to the London exchange to buy everything there, etc.?
Finally, how is the market capitalization of a share calculated in these cases? Is the market cap reported separately for each of the shares in different exchanges, or do they sum all of these up, and report the same number for all the exchanges? That is, let's say that in New York the company has listed 1000 shares, and in London only 10 shares, each worth $10 USD, would it be correct to say that the market capitalization is $100 USD for the London stock? Or is it $100 USD for the London listed stock, and $10,000 USD for the NY listed stock?