Stocks ended another bumpy day with mixed results on Wall Street Monday.

The S&P 500 went up, down, up, and then down again in the last hour of trading to wind up with a loss of 0.4%.

Losses in several big tech companies left the Nasdaq down 0.6% and the Dow Jones Industrial Average closed essentially unchanged.

Small-company stocks rose.

The uncertain trading follows weeks of volatility for major indexes as traders try to figure out how stock valuations will be affected by the interest rate hikes looming on the horizon as the Federal Reserves moves to tame inflation.