(Bloomberg) -- The cost of protecting Oracle Corp.’s debt against default is surging by the most since 2021, as jittery investors and lenders rush to hedge against the billions of dollars the software giant is pouring into artificial intelligence.Oracle, known for its namesake database software, saw the spread on its five-year credit default swaps jump 13.5 basis points on Friday to 101.68 basis points. That’s the biggest bounce since December 2021, according to ICE Data Services.Credit default swap prices ...