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NEW YORK ( TheStreet) -- It's out with the new and in with the old, Jim Cramer said on "Mad Money" Monday about the market's rotation out of many of the recent high fliers and into safer stocks that have yet to rally. Biotech has been on a roll this year but today stocks including Celgene ( CELG) and Gilead Sciences ( GILD) fell out of favor and old pharma such as Bristol-Myers Squibb ( BMY) and Merck ( MRK) were the big winners. In tech, Google ( GOOG) and LinkedIn ( LNKD) are out, while Intel ( INTC) is back in fashion, along with Microsoft ( MSFT) on rumors of a restructuring. The rotation continued in restaurants, said Cramer, with McDonald's ( MCD) rallying and Chipotle Mexican Grill ( CMG) falling. In retail, Michael Kors ( KORS) was out, but Wal-Mart ( WMT) was in. Cramer said all of these moves make perfect sense, if you're a money manager. He said managers can't afford to give up their gains from last month, so rotating into names that haven't moved a lot is a tried and true safety strategy. The markets are simply selling high risk and buying low risk. The only place investors can get into trouble is in trying to scale back into high-yielding stocks like master limited partnerships and real estate investment trusts, Cramer said. These stocks are still too risky because concerns over the Federal Reserve and interest rates haven't subsided.