Investors are hoping Wednesday's big market rally marked the end of the recent correction.

The International Monetary Fund said it expects the world economy to grow strongly in the second half of this year, which could be good for stocks worldwide.

But the IMF also warned that the global economy faces threats like the debt crisis in Europe.

America's debt has also continued to grow rapidly -- up $166 billion in one day last week. That's the third-largest jump ever, according to The Washington Times.

Even though the growing debt could hurt the dollar and the value of investments in U.S securities, China said it would not sell off its holdings in U.S. Treasury notes. However, the Chinese said Washington needs to protect the dollar.