Wall Street ticks up in premarket, oil prices rise amid Iran threats

By YURI KAGEYAMA and MATT OTT, AP Business Writers Stock indexes were mostly rising in premarket trading on Wall Street Wednesday and oil prices rose modestly after Iran threatened to block Middle East energy exports in retaliation for the U.S. resuming its blockade of Iranian ports. Futures for the S&P 500 inched up 0.1% before the opening bell, while futures for the Dow Jones Industrial Average were unchanged. Nasdaq futures climbed 0.5%. Morgan Stanley shares rose 2% in premarket trading after the bank reported revenue of $21.3 billion in the second quarter and profit of $5.6 billion, both records. That…