Citigroup Wealth Management's Chief Economist, Chief Investment Strategist, and interim Chief Investment Officer, Steven Wieting, believes that the most likely outcome of the Fed's interest rate decision this week will be a 25 basis point rate cut. However, he emphasizes that no one can say for sure what the Fed will do.

Wieting points out that the Fed's history of rate cuts shows that when the central bank is simply adjusting monetary policy to suit current economic conditions, it will typically cut rates by 25 basis points. However, when the economy is on the brink of recession, the Fed typically implements larger rate cuts.