Market uncertainty looms as investors await inflation report and tech stocks falter.

Stock futures were flat ahead of the release of March's consumer price index, a key data point that could affect the Federal Reserve's rate decision come May. Investors are also looking ahead to the release of minutes from the Federal Reserve's March policy meeting and the start of first-quarter earnings season. The banking industry is still in a fragile state as the Federal Reserve continues to hike benchmark interest rates, according to former Kansas City Fed chief Thomas Hoenig.