US Stocks-Wall St futures mixed ahead of CPI, bank earnings; US-Iran tensions in focus

U.S. stock index futures were mixed on Tuesday as investors braced for a pivotal inflation report and earnings from Wall Street's biggest banks, while U.S.-Iran tensions sent oil prices surging and threatened to reignite price pressures.

JPMorgan Chase, Goldman Sachs, Wells Fargo and Citigroup are set to kick off the second-quarter earnings season on Tuesday.

Investors will scrutinize the results for early signals on the health of corporate America.

The earnings season could prove a key test for this year's equity rally, which has lifted the benchmark S&P 500 by about 10%.

At 05:13 a.m. ET, Dow E-minis were down 118 points, or 0.22%, and S&P 500 E-minis were down 1 point, or 0.01%. Nasdaq 100 E-minis were up 142.75 points, or 0.48%.