Federal Reserve Chair Jerome Powell is known for providing clear signals about the central bank’s next interest rate move in order to avoid roiling markets. But Wall Street was mostly clueless this week when it came to predicting how big a rate cut the Fed would deliver on Wednesday.

Wall Street ticked slightly higher as markets awaited an expected interest rate cut by the U.S. Federal Reserve, the first in more than four years.

Market participants increased their bets on Friday that the Federal Reserve will move aggressively when it starts cutting interest rates next week.