[Amazon's U.S. stock rises 11% pre-market, Q2 cloud business revenue exceeds expectations] BlockBeats news, on July 31, according to BIT (bit.com) market data, Amazon (AMZN.O) rose 11% pre-market in U.S. trading as Q2 cloud business revenue exceeded expectations. Apple (AAPL.O) fell 6.7% as Q4 revenue guidance missed expectations. SK Hynix (SKHY.O) rose 7% pre-market in U.S. trading.