Global markets displayed a mixed performance as investors awaited crucial decisions from central banks, with Wall Street experiencing choppy trading ahead of a Federal Reserve interest rate announcement.New York Fed President John Williams' remarks earlier this month signaled a possible rate cut, bolstering the financial sector and leading to expectations of a 25 basis point reduction.Separately, Nvidia shares rose after the Commerce Department permitted H200 AI chip sales to China, while JPMorgan saw its shares drop following cautious consumer environment comments from Marianne Lake.