Stocks turned broadly lower on Wall Street Tuesday as investors shifted money into bonds, sending yields to their lowest level in nearly two years.

Bond prices rose and the yield on the 10 year Treasury dropped to 2.26%, its lowest level since September 2017. Falling yields are typically a sign that investors feel jittery about long-term economic prospects.

On Tuesday:

The S&P 500 index fell 23.67 points, or 0.8%, to 2,802.39.

The Dow Jones Industrial Average dropped 237.92 points, or 0.9%, to 25,347.77.

The Nasdaq composite dropped 29.66 points, or 0.4%, to 7,607.35.

The Russell 2000 index of smaller companies gave up 10.09 points, or 0.7%, to 1,504.02.

For the year:

The S&P 500 is up 295.54 points, or 11.8%.

The Dow is up 2,020.31 points, or 8.7%.

The Nasdaq is up 972.07 points, or 14.7%.

The Russell 2000 is up 155.46 points, or 11.5%.