Buying Caterpillar (CAT - Get Report) shares when they are up hasn't worked, according to TheStreet's founder and Action Alerts PLUS Portfolio Manager Jim Cramer.

The company reported earnings on Monday, sending the stock higher. But the stock wrapped up the trading session in negative territory.

"If you listen to the conference call, you would have realized that there's enough negatives that you would get some downgrades like the Barclays downgrade," Cramer noted.