Goldman Sachs has offered to speed up delivery of aluminum stored in warehouses that it controls as federal authorities examine how delays at the facilities have driven up the price of the metal.

Under scrutiny for the long waits that have cost manufacturers — and ultimately consumers — many millions of dollars, Goldman said on Wednesday that its warehouse unit, Metro International Trade Services, would give customers who store aluminum at the warehouses immediate access to their metal.

Through Metro International, Goldman stores vast amounts of aluminum in and around Detroit. An investigation by The New York Times found that Metro routinely shuffled tons of the metal from one warehouse to another, a tactic that profited Goldman but pushed up the price of aluminum across much of the nation.

Goldman also said on Wednesday it would suggest ways to improve the metal storage system, whose rules are dictated by the London Metal Exchange.