JAPAN-BASED virtual currency exchange Coincheck said yesterday it will refund about US$400 million to customers after hackers stole hundreds of millions of dollars’ worth of digital assets. The company said it will use its own funds to reimburse about 46.3 billion yen to all 260,000 customers who lost their holdings of NEM, the 10th biggest cryptocurrency by market capitalization. On Friday, the company detected an “unauthorised ...