Trading in LongFin Corp. shares LFIN, +47.28% have been halted by the Nasdaq Stock Market as of Friday morning, for "additional information requested." Just prior to the halted, the stock was up 47.3% at $28.19. The halt comes as the Securities and Exchange Commission said it obtained an "emergency" freeze of $27 million in stock sales of what it called LongFin a "purported cryptocurrency company." The Nasdaq did not provide details of what information it had requested. The stock had been down 47% over the past three months prior to the halt, while Bitcoin futures XBTJ8, -2.51% have shed 61% and the S&P 500 SPX, -1.31% had slipped 4.1%.