The US SEC on Wednesday approved new listing rules for major exchanges, paving the way for a surge of crypto spot exchange-traded funds. On Wednesday, the regulator voted to let Nasdaq, Cboe BZX and NYSE Arca adopt generic listing standards for commodity-based trust shares. The decision clears the final hurdle for asset managers seeking to launch spot ETFs tied to cryptocurrencies beyond Bitcoin and Ether. In July, the SEC outlined how exchanges could bring new products to market under the framework. Ass ...