I have this question of the stock market ... When apple shares rise or fall why does its market capacity gets reduced or increases too much more than other conpanies .. for eg. Yesterday the price of apple share was 400 and its market capacity was also 400B today the price rose to 424 and its market cap increased to 416B.. But when googles share at 900 with market capacity of 300 increased to 924.. It's market capacity increased only to 304B .. How and why does apple add so many billions to its market cap at the same rise .. ???