Facebook shares have hit a new low after trading resumed in America after the Memorial Day public holiday, falling under $US30.
The fall represents a 9.6% loss in value in one day, as the stock has continued to fall from its opening price of $US38.
The result comes as investors are still keen to pursue lawsuits against the company and investment banks, claiming they were given misleading advice.
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Analysts have continued to slam the company for floating at such a high price, saying the $US100 billion valuation was too high.
Shares finished the day at $US28.84.