Apple (NASDAQ: AAPL) and Nike (NYSE: NKE) are down over 20% year to date at the time of this writing, significantly underperforming the S&P 500 and Nasdaq Composite, which are also down significantly.

The Porsche Tennis Grand Prix was held on indoor hard courts from 1978 to 2008, but has been contested on indoor clay courts since 2009. The state-of-the-art Porsche Arena in Stuttgart, Germany has ...