Central bank event causes market drift.

Investors are cautious ahead of three major central bank meetings this week, with the Reserve Bank of Australia and Bank of Canada's surprise interest rate hikes adding to uncertainty about whether the US Federal Reserve will surprise or stand still on Wednesday. The European Central Bank is expected to hike and stay hawkish, while the Bank of Japan is expected to stick to its ultra-loose monetary policy. Stocks in Asia are muted, while the US dollar is steady. BioNTech will defend itself against a damages lawsuit from a woman alleging side effects from its COVID-19 vaccine, and former Scottish First Minister Nicola Sturgeon denies allegations after being arrested and held for more than seven hours as part of a police probe into the fate of funds for her pro-independence Scottish National Party.