The Federal Reserve isn't expected to announce any changes to its key interest rate Wednesday, a sign of caution amid significant economic uncertainty. These borrowing costs have wide ripple effects across the economy,

The Federal Reserve voted to keep the base interest rate flat for the second time this year, hoping to tamp down inflation that has remained stubbornly high.

In an economy wracked by uncertainty, one thing seems virtually guaranteed: the Federal Reserve will leave its key interest rate unchanged when the central bank's policy committee meets Tuesday and Wednesday.