Shares of online brokerage firm, TOP Financial Group (NASDAQ: TOP) surged by more than 500% in pre-market trading on Friday for unexplained reasons. On Thursday, trading for the stock was halted several times due to the volatility.
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TOP, formerly Zhong Yang went public in June last year, pricing the stock at $5 per share.

TOP stock has surged by more than 200% year-to-date