Apple Inc.’s much-awaited quarterly earnings report failed to soothe investor concerns about its biggest challenges, including escalating tariff costs and a slowdown in China.

The company announced it upped its quarterly cash dividend to $0.26 per share and its board approved a $100 billion share buyback program.

Apple's iPhone revenue was up 5% to $95.4 billion, beating the analyst consensus of $94.5 billion. But another closely-watched segment, results from China, was less positive. Apple's Greater China revenue missed expectations by almost a billion dollars,