The rather lukewarm response to the much-hyped Facebook IPO - with the company's first day of trading on Friday having witnessed a marginal increase from $38 to $38.37 per share at the close of the day's business - has resulted in stock woes for a number of social media sites.

Among the leading social media sites, which suffered stock blows due to the Facebook IPO's lackluster performance at the opening day's end, were the social gaming biggie Zynga, as well as LinkedIn, Groupon, Yelp, and Chinese social networking site Renren.

While some heavy losses were witnessed by Zynga, which saw its stock plunging 14 percent, from the beginning of the day on Friday, to $7.12; the LinkedIn stock tumbled by 6 percent; Groupon by 7 percent; Yelp by 3 percent, and Renren by a massive 21 percent.

The stock plunges occurred so quickly that a trading halt was placed, so as to enable the investors to evaluate the situation before they resume trading. Such trading halts mark the usual procedure which is followed for stocks that witness rapid fluctuations.

About the reason behind the plunge in the stocks of social media sites after the not-so-enthusiastic response to the Facebook IPO, Colin Sebastian of Robert W. Baird said that the drop was essentially an upshot of the massive number of Facebook shares which hit the market.

With regard to Zynga's stock drops, Sebastian said: "I don't think there's anything fundamental about Zynga that has changed this morning. I think there are some investors that sold some of their Zynga shares just to buy Facebook."