US stock futures were little changed on Tuesday after the major indexes opened the week lower, with risk appetite restrained by uncertainty over a US-Iran deal and expectations that firmer inflation pressure could keep monetary policy tight. Monday’s regular session saw the Dow Jones Industrial Average fall 0.11%, the S&P 500 slip 0.06% and the Nasdaq Composite lose 0.32%. Oil prices jumped as concerns tied to the Middle East conflict persisted, helping push Treasury yields higher and adding to worries that the Federal Reserve may need to raise interest rates despite signs of a cooling labor market. Markets are now focused on inflation readings due later this week for fresh guidance on the policy outlook. Investors are also awaiting earnings from Cardinal Health, CoreWeave and Super Micro Computer.