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NEW YORK (TheStreet) -- Investors need to tame their fears and take advantage of glorious days like today, Jim Cramer told his "Mad Money" TV show viewers Tuesday. You must act upon opportunities like Monday's selloff when the market offers a one-day sale with great prices on many stocks.
When the markets are in a panic, that's the time to circle back to the big, long-term themes, Cramer said -- themes like social, mobile and the cloud. Stocks such as Facebook (FB) and Google (GOOG) aren't affected by turmoil in Europe or trouble in the Ukraine.
Then there's biotech, with names like Isis Pharmaceuticals (ISIS). Are orphan drugs sensitive to the Ukraine? Nope. That's why Gilead Sciences (GILD), BIogen Idec (BIIB) and Regeneron (REGN) were all leaders today.Other long-term themes include the revolution in oil and gas where companies such as Continental Resources (CLR - Get Report) actually benefit from global tensions as oil prices rise. Turmoil also makes people more frugal, Cramer added, which is good news for private-label food maker Perrigo (PRGO). Healthy eating isn't going out of style either, making Chipotle Mexican Grill (CMG) another good stock to own. Wait for pullbacks like Monday and buy any of these themes when they're on sale, Cramer concluded. Panic is never a strategy but all you need is the courage to buck the trend and buy.