FedEx Corp FDX.N said labor shortages drove up wage rates and overtime spending, while Nike Inc NKE.N blamed a supply-chain crunch and soaring freight costs as it lowered its fiscal 2022 sales estimate and warned of holiday-season delays. By Caroline Valetkevitch NEW YORK, Oct 11 (Reuters) - Investors are primed for another period of strong U.S. profit growth as third-quarter reports from Corporate America flow in starting this week. But as business continues to emerge from the coronavirus pandemic, new problems are arising that are taking center stage for Wall Street, including supply-chain snags and inflationary pressures.