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January's S&P 500 Winners and Losers

February 01, 2011 | Filed Under »
Tickers in this Article » NVDA, MU, ISRG, MRO, WY, MWW, SVU, TLAB, RSH, FFIV
On a day-to-day basis, most stock tend not to have dramatic price movements. However, material news/information that is fundamental to an industry, sector or stock's business does get released periodically. This type of news has the potential to move a stock by several percentage points (in either direction). While it is a measure of prestige, a stock's inclusion into the S&P500 does not protect the stock to downward movements. But even if a stock has already moved, it might still warrant a look. After good news, a stock may increase in value, but this momentum can often continue on for more upside. Likewise, bad news often knocks down a stock's price more than is warranted, causing it to sell at bargain levels until the price moves back up.

Check out which S&P 500 components made the biggest moves in January. By comparison, the entire S&P 500 was up 3.16% and the DJIA was up +3.26% over the same period. (For related reading, see How Now, Dow? What Moves The DJIA?)

IN PICTURES: 9 Simple Investing Ratios You Need To Know

January's Best-Performing S&P500 Stocks

Company
% Change
NVIDIA Corporation (Nasdaq:NVDA)
+58.38%
Micron Technology Inc. (NYSE:MU)
+34.78%
Intuitive Surgical, Inc. (Nasdaq:ISRG)
+30.35%
Marathon Oil Corporation (NYSE:MRO)
+23.73%
Weyerhaeuser Co. (NYSE:WY)
+23.67%

January's Worst-Performing S&P500 Stocks

Company
% Change
Monster Worldwide Inc. (NYSE:MWW)
-30.97%
SUPERVALU Inc. (NYSE:SVU)
-23.58%
Tellabs, Inc. (Nasdaq:TLAB)
-21.25%
RadioShack Corp. (NYSE:RSH)
-19.50%
F5 Networks, Inc (Nasdaq:FFIV)
-18.15%
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