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Cramer sees a 'sure signal to buy' stocks. Plus what we want from Amazon's results

Jim Cramer said there is a clear sign to buy stocks after the market went up. The market rose because the Federal Reserve decided not to change interest rates. Chip stocks and Microsoft led the rise, and Cramer said this was helped by the failure of a tech hedge fund run by Leopold Aschenbrenner. Investors are also waiting for Amazon's earnings report to see more clues about the market.