TheStreet's founder and Action Alerts PLUS Portfolio Manager Jim Cramer urges investors to listen to company conference calls following an earnings release.

"A lot of the analysts raised their price targets on Micron (MU) , but there's no conviction," Cramer noted. "One of the things I always urge people to do is listen to the conference call because you will hear that there is no conviction."

Micron shares are up 44% since the start of the year. 

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