Oil prices ended the week slightly lower as U.S. inventory builds and oversupply fears outweighed the Federal Reserve’s long-awaited interest rate cut. oil oil oil oil oil oil oil gas gas Friday, September 19, 2025 The long-anticipated US Federal Reserve interest rate cut has failed to deliver a new bullish boost to oil prices, as the news was quickly offset by larger-than-usual US inventory builds and recurring concerns about OPEC+ policy leading inevitably to oversupply next year. Oil prices ar ...