Global investors had a stark reminder of how quickly the oil market can reignite concern about inflation and volatility, after U.S. President Donald Trump said on Wednesday that an interim agreement with Iran to end the war “is over”. Inflation-sensitive assets such as bonds and gold tumbled in the face of a 5% surge in oil. “It’s a big wake-up call for markets,” said Aneeka Gupta, director of macroeconomic research at Wisdomtree. The expectation had been “that we were likely to start to…