Why Nutrisystem, Tenet Healthcare, and AbbVie Jumped Today

The stock market continued to be choppy on Tuesday, with major benchmarks moving in different directions. Weakness in the Dow Jones Industrial Averagecame largely from substantial price declines in some of the more heavily weighted stocks in the average, while the S&P 500and Nasdaq Compositemade gains.

With key tech players set to release earnings, investors are a bit anxious to see whether anticipated bottom-line growth materializes, and some market participants are also continuing to look at interest rates as the Federal Reserve began a two-day meeting to discuss monetary policy. Still, some companies had good news that lifted their shares. Nutrisystem (NASDAQ: NTRI), Tenet Healthcare (NYSE: THC), and AbbVie (NYSE: ABBV)were among the best performers on the day. Here's why they did so well.