Mutual funds run by Fidelity Investments (FMR LLC) bought a modest 2.4 million shares of Twitter Inc. in the days after its public debut. This revealed that Fidelity was not willing to take any early, big bets on the microblogging site.

Reuters, citing latest available fund disclosures, said that Fidelity's Contrafund led the way, holding 1.1 million Twitter shares at the end of November. The said stake was worth $73 million on Monday, a small bet for a fund with net assets of $109 billion.

In all, nearly 30 Fidelity funds bought Twitter shares, according to data from Fidelity and Lipper Inc. Fidelity and Lipper is a Thomson Reuters company.

Twitter stocks is up 155% over its November 7 initial public offering price of $26 per share. But investors are debating whether it will become just a social media niche or achieve the giant status of Facebook Inc., the report said.

The microblogging site's stock fell 4% on Monday to a close of $66.29 per share after analysts at Morgan Stanley downgraded Twitter to under weight from equal weight, Reuters said.