TheStreet's Action Alerts PLUS Co-Portfolio Manager Jim Cramer says Tim Cook's decision to buy back shares of Apple was "necessary" and Apple is now an "aggressive buy." Of the major S&P 500 companies Cramer follows, Apple has performed the best during the selloff because the tech giant took advantage of the decline and bought opportunistically and aggressively. Cramer says Apple CEO Tim Cook has "totally delivered" and places a high importance on his company's stock price, and the decision to buy back the stock is "perfect."

At the time of publication, Cramer was long ___.

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