What is the forex market? can I use Yahoo to trade in forex?

The Forex market is the FOReign EXchange market or simply the currency market. This is an investment market in it's own right in that international traders will study various macro-economic variables of many countries and try to identify opportunites to make profit by either buying or selling various currencies. The best current example of an investor taking a bet on the Forex market is Warren Buffet's well publisised view that the US dollar will weaken over time, which effectively means that other currencies will strengthen over time relative to the dollar. Buffet has taken a US$35 billon dollar bet that this will happen by investing in many non-US based companies. You probably can't use Yahoo to conduct Forex trades as most countries have specific laws around who and how you can buy and sell money. However, everytime you travel overseas and purchase traveller's cheques and then cash them when you come back home, you are effectively conducting a forex trade.

Foreign Exchange Market .... you buy and sell currencies.
NO.

Forex stands for foreign exchange. In other words you're buying stocks in a foreign country. You won't be able to transact in Yahoo Finance, but you'll be able3 tokeep track of your portfolio at a glance. You'd be better to trade through a company on line like Charles Schwab, Ameritrade, as two possibilities for trading online Be sure to do your research first and up front and above all, know what you're buying.