The latest post on ‘Mashable’ is titled “Facebook Will Join S&P 500 on Dec. 20”. Seth Fiegerman says, “It looks like Facebook will end the year on a high note.Facebook will join the Standard and Poor’s 100 and 500, blue chip indices that serve as a benchmark for the economy, on Dec. 20. The news, which was announced by the S&P late Wednesday, sent Facebook’s stock up as much as nearly 5% in after hours trading as the S&P comes with a built-in base of fund managers”. Facebook Will Join S&P 500 on Dec. 20 Mashable.com  [...]