S&P 500 Gains & Losses Today: Markets Surge After US, China Agree to Slash Tariffs

1. NRG Energy shares surged 26% after strong earnings beat estimates. 2. The company announced a $12 billion acquisition of natural gas assets. 3. NRG's adjusted EPS of $2.68 exceeded analyst expectations by over 60%. 4. The S&P 500 gained 3.3% influenced by a U.S.-China trade deal. 5. Overall market optimism could further benefit NRG and the sector.