There were 38 companies in the S&P 500 with Q2 revenue decline of 50% or more. It makes sense that concerts, cruise operators, hotels/casinos, airlines and travel sites are heavily represented. There was very little activity in those areas in April, May and June. Energy sector is also featured prominently.
2015 Review: Sectors & Stocks
Reviewing top performing sectors and stocks
2015 Review: Significant Events
Reviewing major stories of 2015 and how they affected the markets