Coca-Cola Co KO.N gained 2.4% as announced plans to nearly halve its operating units and offer voluntary separation to 4,000 workers. By Medha Singh and Devik Jain Aug 28 (Reuters) - The S&P 500 rallied for the seventh straight session on Friday, powered by tech stocks, prospects of super-low interest rates for a prolonged period and hopes of a medical solution to the COVID-19 pandemic. The core PCE index, the Federal Reserve's preferred inflation measure, increased 1.3% in the 12 months through July, closer to the central bank's 2% target which is now a flexible average.