Four cryptocurrency companies and 14 individuals have been charged, U.S. prosecutors said on Wednesday, marking the first criminal indictment of a financial services firm for manipulating the cryptocurrency market and conducting fraudulent transactions. Federal prosecutors in Boston have filed charges against companies including Gotbit, ZM Quant, CLS Global, and MyTrade, as well as their leaders and employees, and have arrested multiple overseas suspects. Five have agreed to plead guilty or have already pleaded guilty.