U.S. stock futures were mixed on Wednesday, as the Nasdaq 100 index fell, while Dow Jones and S&P 500 indices rose, following Tuesday's lower close. Investors are waiting for some direction on the Federal Reserve’s trajectory, following its suspension of guidance, as the minutes of the Fed’s July FOMC meeting will be published today. Asian markets plunged on Wednesday as South Korea’s KOSPI tumbled over 5% and semiconductor giants SK Hynix and Samsung Electronics suffered steep losses, triggering a sell-side sidecar in Seoul. The regional sell-off came amid escalating US-Iran tensions that pushed Brent crude above $91 a barrel after President Donald Trump ruled out talks with Tehran. “There are no talks or conversations going on, or scheduled, with the Islamic Republic of Iran,” Trump said in a Truth Social post. Meanwhile, the 10-year Treasury bond yielded 4.68%, and the two-year bond was at 4.15%. The CME Group’s FedWatch tool projections show markets pricing a 32.8% likelihood of the Federal Reserve hiking the current interest rates during its September meeting. The SPDR S&P 500 ETF Trust(NYSE: SPY) and Invesco QQQ Trust ETF (NASDAQ: QQQ), which track the S&P 500 and Nasdaq 100, respectively, were higher in premarket on Wednesday. The SPY was up 0.066% at $767.96, while the QQQ declined by 0.042% to $717.21.