Pitney Bowes Inc. (PBI), Cirrus Logic, Inc. (CRUS), Keryx Biopharmaceuticals (KERX): Here’s What This $3 Billion Market Wizard Has Been Buying

Tudor Investment reduced its stake in lots of companies, including Keryx Biopharmaceuticals (NASDAQ:KERX) , which offered disappointing trial results a year or so ago for its experimental colorectal cancer drug perifosine, but more recently announced very promising results for its Zerenex treatment for complications due to end-stage renal disease. That boosted the stock, which later slumped on news of a secondary stock offering to raise funds. Bears worry that there are not a lot of other contenders in the company’s pipeline and wonder if Zerenex will be able to fend off competition. The company believes that the growing market of dialysis providers may welcome Zerenex as a way to lower costs.

Finally, Tudor Investment’s biggest closed positions included the PowerShares KBW Bank Portfolio ETF and SPDR Select Energy Sector ETF. Other closed positions of interest include RF Micro Devices, Inc. (NASDAQ:RFMD) , which specializes in radio-frequency (RF) components and semiconductors. Like Cirrus Logic, Inc. (NASDAQ:CRUS), it has been benefiting handsomely from being a component supplier for iDevices (and lower-end phones). Bulls are hopeful that it will do a lot of business in China, where smartphones and upgrades of phones are strong sellers. Some analysts are also expecting a rebound in global semiconductor demand, which bodes well for the company, and smartphones are increasingly employing more RF technology. Still, it faces serious competition, including from deep-pocketed QUALCOMM, Inc. (NASDAQ:QCOM).

We should never blindly copy any investor’s moves, no matter how talented the investor. But it can be useful to keep an eye on what smart folks are doing. 13-F forms can be great places to find intriguing candidates for our portfolios.

The article Here’s What This $3 Billion Market Wizard Has Been Buying originally appeared on Fool.com.

Longtime Fool contributor Selena Maranjian, whom you can follow on Twitter, owns shares of Apple and Qualcomm. The Motley Fool recommends Apple, Facebook, and Lowe’s. It owns shares of Apple, Cirrus Logic, Facebook, and Qualcomm.

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