[NEW YORK] The Standard & Poor's 500 will soon contain 505 listed stocks, up from the current 502 listed stocks.
S&P Dow Jones Indices, which oversees the benchmark index of large US stocks, on Monday announced a methodology change that will cause three more companies to have multiple listings: Comcast Corp, News Corp and Twenty-First Century Fox.
The change follows a move made in January to allow multiple share classes in S&P indexes. It will take effect after the close of trading on Sept 18, to coincide with a quarterly rebalancing.
Google and Discovery Communications already are represented by two share class lines each in the S&P 500 index.
Warren Buffett's Berkshire Hathaway, which also has two share classes, is an exception because its Class A shares are not heavily traded, and only its Class B shares are reflected in the index.