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Hot Stock Minute

Here’s a look at some of the stocks the Yahoo Finance team will be watching for you today.

After the close on Friday, Standard and Poor's announced Keurig Green Mountain (GMCR), formerly Green Mountain Coffee Roasters, will join the S&P 500 (^GSPC) effective after the close on March 21st. Keurig Green Mountain will replace WPX Energy (WPX) in the index.

The board of Sears (SHLD) approved the spin off of Land's End, which will begin trading on the Nasdaq in early April under the ticker "LE." Sears stockholders on record as of March 24 will receive about 0.3 shares of Lands' End common stock for each share of Sears they own.

Castlight Health (CSLT) had a stellar debut Friday. The cloud-based maker of software for healthcare companies soared 149% after its initial public offering Friday. The company priced shares at $16, above an already raised expected price range of $13 to $15 a share. Castlight raised $178 million in the offering. In his piece for Yahoo Finance’s The Exchange, technology reporter Aaron Pressman called this IPO "the craziest deal since the heights of the Internet bubble."

Finally, we’re watching shares Chinese Internet giant, Sina (SINA). The company's Twitter-like messaging service Weibo filed for its IPO in the U.S. on Friday. Weibo is looking to raise $500 million in the offering, which will be managed by Goldman Sachs and Credit Suisse. In its filing, the company lists Chinese government censorship as one of its risk factors. Weibo was founded in 2009 and has a user base about half the size of Twitter's.