The dollar gained against the euro

The dollar gained against the euro and the yen as investors continued to worry about further danger for the economies of Europe and Japan.
The greenback rose against the 15-nation euro, which fell 0.6 cents, or about 0.5% to $1.275, but fell against the British pound, which rose 1.2 cents, or about 0.8%, to $1.452.
The dollar also advanced ¥1.33, or about 1.4%, to ¥94.76 against the Japanese yen.
Officials from the European Central Bank expressed concern for the euro-zone economy, according to Reuters.
European nations could face severe debt problems after implementing large economic stimulus packages, according to Jose Manuel Gonzalez-Paramo, a European Central Bank board member at a conference in Madrid.
ECB President Jean-Claude Trichet also expressed concern for the European economy, saying that without proper regulation, banks in the region risk damaging the euro zone's financial system as they sell off assets to reduce their exposure to debt, according to Reuters.
Investors are also worried about the euro zone's exposure to the economic crises in nearby countries and Eastern Europe, according to Jacob Oubina, currency strategist with Forex.com.
Europe has "massive exposure to emerging markets."
And because the euro-zone is a conglomeration of nations, the ECB may not have enough tools to right the euro-zone economy - if they need to buy bonds to support the region, it's not clear which bonds they should buy, Oubina added