TheStreet's founder and Action Alerts PLUS Portfolio Manager Jim Cramer is keeping an eye on Under Armour's (UAA - Get Report) earnings on Tuesday. 

"I think Under Armour is a troubled company in a troubled industry," Cramer said, adding that Nike (NKE - Get Report) is an expensive stock. 

Cramer also thinks Under Armour is an expensive stock and has no case for owning it. 

Under Armour shares are down 43% since the start of the year. 


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