The Canadian dollar experienced a modest increase against the US dollar as investors positioned themselves ahead of the Federal Reserve's upcoming monetary policy announcement. According to Investing.com Forex, this slight gain reflects cautious optimism in the market.

Meanwhile, the Swiss Franc remained steady against the US dollar on Tuesday, with traders adopting a cautious stance in anticipation of the Fed's decision on Wednesday. FX Street reported that this stability underscores a wait-and-see approach among currency markets.

For Japanese investors, these movements highlight the broader global market uncertainty ahead of key central bank announcements, which can influence forex and equity markets in Japan.