CNN Money

CNN Money is targeted at US users, more so than Yahoo Finance or Google Finance. Indeed, it seems to know nothing about non-US stocks: a search for ARM on CNN Money will return only Arvinmeritor Inc, the auto parts supplier, without mention of ARM Holdings, the microprocessor architect.

CNN's site has a mechanism to enter transactions (rather than just holdings) and set a cash value to add to the portfolio, but is nowhere as sophisticated as Yahoo Finance.

Simply, CNN Money is not a great choice to monitor a portfolio online, and is completely useless if you trade in non-US stocks.