S&P 500 to become 505 with acceptance of new share classes By: Reuters: Company News January 22, 2015 at 10:26 AM EST Jan 22 (Reuters) - The S&P 500 index will become 505 after Comcast Corp, Twenty-first Century Fox Inc and News Corp add new share classes. Read More >> Related Stocks: Comcast Corp Discovery Communications Google, Inc. News Corporation Twenty-First Century Fox