Zuckerberg's wealth down $4.5 bn as Facebook tumbles on NASDAQ

Zuckerberg's fortune has declined to USD 11 billion from USD 15.5 billion on May 18 when the company went public as investors have dumped the stock amid concerns over growth prospects of the social networking giant, according to the data available with stock exchanges.

Within three weeks of making an entry into the secondary market, the stock value of the company has collapsed by about 29 per cent to USD 27.10 apiece on Friday from USD 38 on debut.

Zuckerberg's about 408 million shares were valued at USD 15.5 billion based on debut price of USD 38. However, on Friday's closing price of USD 27.10 apiece, his wealth has shrunk to USD 11 billion, a erosion of around USD 4.5 billion.

However, he has already encashed a total of USD 4.78 billion by offering his 126 million shares in the public issue at the the price of USD 38 apiece. Zuckerberg, who founded Facebook out of his Harvard University dormitory in 2004, sold shares to use the IPO proceeds to pay taxes.

As Facebook's stock price has declined, so has its market capitalisation. The company's current market cap is about USD 58 billion. However, when the company went public, its market value was about USD 104 billion.

With 901 million users as of March 31, 2012, Facebook was actually planning to sell 337.41 million shares in the initial public offering (IPO) at a price between USD 28 and USD 35 per share.

At the last moment, the company had increased the size of the public issue by offering an additional 25 per cent stake and also raised stock price to a range of USD 34 and USD 38 a share.

Contrary to widespread expectations, Facebook's stock market debut did not live up to all the hype so far.

Interestingly, shares are now trading in the original price range of USD 28-USD 35 price, which the company had set for its IPO.

Even before Facebook made a debut, some market analysts said that the stock was overpriced at USD 38 apiece and one must wait for now to invest in the firm. Besides, some analysts criticised the decision to boost more shares to the public than originally planned, which lowered demand for the stock.