The minutes revealed that some policymakers "raised the possibility that it might be appropriate to increase the federal funds rate relatively soon." That was an unwelcome surprise to many investors, who haven't had to worry about increases in the Federal Reserve's benchmark short-term interest rate for years.
The Dow Jones industrial average fell 89.84 points, or 0.6 percent, to 16,040.56.
The Standard & Poor's 500 index lost 12.01 points, or 0.7 percent, to 1,828.75.
The Nasdaq composite fell 34.83 points, or 0.8 percent, to 4,237.95.
For the week:
The Dow is down 113.83 points, or 0.7 percent.
The S&P 500 is down 9.88 points, or 0.5 percent.
The Nasdaq has lost 6.07 points, or 0.1 percent.
For the year so far:
The Dow is down 536.10 points, or 3.2 percent.
The S&P 500 is down 19.61 points, or 1 percent.
The Nasdaq is up 61.36 points, or 1.5 percent.