Facebook was the most-loved holding of hedge funds before the stock's epic plunge on Thursday, resulting in a massive multibillion-dollar loss for the so-called smart money on Wall Street. Of 848 hedge funds tracked by Goldman Sachs, 97 had Facebook as a top 10 holding, according to the firm's May "Hedge Fund Trend Monitor" report. The note, tracking $1.6 trillion in hedge fund long positions, used the latest available filings for the first quarter. The report ranked Facebook as the No. 1 most-held stock in the top 10 positions among those hedge funds, followed by Amazon at 74 funds.