Dow, S&P 500 and Nasdaq futures were little changed after hours, even after a bearish regular session put the market rally under added pressure.
The Dow Jones and S&P 500 fell below key technical levels, signaling weakening momentum as investors absorbed fresh selling.
Crude oil prices jumped on new U.S.-Iran attacks, while Treasury yields also moved higher, adding to the market's headwinds.
Dell Technologies, Palo Alto Networks, Credo Technology and MongoDB reported earnings after the close, giving investors fresh catalysts for the next session.