Universal Display (PANL): This stock is just too hard, Jim Cramer said.
VirnetX (VHC): Earlier, Cramer suggested buying VHC through call options. It was a winning trade, he said, but stay away from it now.
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Get a behind-the-scenes look at how Cramer formulates his investment advice. "Inside the Madness" is a column, which features e-mails and more with Cramer and his researcher Nicole Urken.
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