The dollar continues to tighten its grip as the world's reserve currency.

The currency markets overseas economies took a tumble on Friday. Here's why the United States should keep an eye out — but not worry too much.

Right now, Bitcoin functions mainly among early Bitcoin adopters – who have pushed the currency’s value to a record level.

There will now be a direct trading link between the British pound and the Chinese renminbi — and that could be bad for the dollar.

Then it starts a journey that will likely take it overseas or underground into a big pile of cash that nobody can find.

With the focus on Syria, also keep an eye on an unfolding economic meltdown in one of the world's most important economies: India.

A run on India's currency presages trouble in other emerging markets.

A crop of start ups with venture capital backing are trying to make Bitcoin more mainstream and easy to trade.

The Winklevoss twins are trying to set up a fund that will allow investors to trade Bitcoins as if they were stock.

First there was the rigging of the interest rate known as LIBOR. Now there may be collusion on currency exchange rates.