By David Shepardson WASHINGTON (Reuters) – Three U.S. senators said they want Frontier Airlines and Spirit Airlines (OTC:SAVEQ) to disclose whether they are manipulating seat fees by using customers’ personal information to charge different fees to passengers on the

Investing.com– Nvidia supplier SK Hynix Inc (KS:000660) posted a sharp increase in its fourth-quarter profit on Thursday, as the memory chip maker benefited from increased demand for high-end chips from the artificial intelligence industry.  Operating profit surged 2,236% to