OKX filed with the Securities and Exchange Commission on Sunday to launch a tokenized-stock trading platform, making it one of the first major crypto exchanges to take advantage of new US rules allowing digital versions of public-company shares to trade on crypto venues.OKXICE LLC, a joint venture between cryptocurrency exchange operator OKX and New York Stock Exchange parent Intercontinental Exchange Inc., plans to seek approval to offer tokenized shares of an initial 63 public companies. Under...