With news that the federal government is bailing out Citigroup with a $20 billion investment and $300 billion worth of asset-backing, the Dow gained almost 400 points, ending the day up 4.93% at 8443. However, CNBC reports, "It was the market's best two-day run since after the crash of 1987 but proved to be a nail-biter at the end, with stocks yo-yo'ing a couple hundred points in the final 10 minutes of trading, after being up more than 550 points." The Nasdaq was up 6.33% and S&P 500 rose 6.47%.