The stock market posted its biggest one-day gain since March 23, 2009 on Monday. The jump was in response to Europe’s $1 trillion rescue plan to aid troubled countries such as debt-plagued Greece and stabilize the euro, said CNN.com.

The Dow Jones surged 405 points, or 3.9 percent, while the S&P 500 rose 49 points, or 4.4 percent, and the Nasdaq jumped 109 points, or 4.8 percent.
Markets around the world also rose as the European Union took aggressive steps to contain a potential financial meltdown.

The rally comes after Thursday’s so-called “flash crash” when the Dow plummeted 998.50 points, the market’s biggest decline during one trading day, until it recovered about two-thirds of the loss at the end of the day. Thursday’s crash was blamed on a computer glitch, and on Monday the SEC and major stock exchanges agreed on a new framework to handle erroneous trades, said CNN.com.

Boeing, Caterpillar, IBM, Hewlett-Packard, McDonald’s and Procter & Gamble were among the companies that posted the biggest gains Monday.