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Weekend Links: Investors and Professionals getting more social

IR newbies looking to leverage social media should cut their teeth on Posterous. (Dominic Jones)

How CIT tried to buy itself a buyout (Clusterstock)

thinkorswim gets rolled out to Ameritrade customers (Barron’s, sub req’d)

Jamie Dimon speaks at Harvard’s Class Day (noise free investing)

More index funds sought for 401(k)s (WSJ)

Ken Heebner of CGM Funds slumps for a 3rd year (Fund my Mutual Fund)

Social Media and Investor Relations Trends (Q4 Blog)

Over all subsequent 5-year periods, for instance, they found that stocks returned 19.5 percent— nearly double the historical average. (Asset Builder)

What Bank of America and Citi’s profits mean for Wall Street (The Atlantic)

StockTwits invites its members to got (StockTwits)

CalPERS Lawsuit just the tip of the iceberg for rating agencies (tech|ticker)