U.S. stocks declined, after equities posted their best monthly gain in five, amid disappointing results from Tyson Foods Inc. and as commodities producers sank.

The Standard & Poor’s 500 Index fell 0.4 percent to 2,095.63 at 12:37 p.m. in New York, near its average price during the past 100 days. The Dow Jones Industrial Average lost 117.82 points, or 0.7 percent, to 17,572.04. The Nasdaq Composite Index decreased 0.3 percent.

Commodities dropped after an official gauge of Chinese manufacturing slid to a five-month low and Iran said it will be able to bolster crude production within a week of sanctions ending.

Source: Bloomberg