Oil rises unsettle investors in US

A renewed rise in oil prices stifled a rally on Wall Street today, leaving stocks mixed and investors worrying that costs will climb further despite Saudi Arabia’s vow to boost production.

Even if the kingdom can increase production, higher supplies aren’t likely to reach the United States in time for the peak summer driving season. On the other hand, higher prices at the pump could put a damper on the nation’s economic growth and make it more likely that the Federal Reserve will delay interest rate increases.