Related:Vanguard Weighs Allowing Trading of Crypto ETFs“The multi-share class ETF structure has served Vanguard index investors well for more than two decades,” said a company spokesperson. Technically, the dual share class structure remained available for other issuers, provided they agreed a licensing arrangement with Vanguard and gained exemptive relief from the SEC. ‘Y2K Moment’The level of maturity already reached by the ETF industry may blunt the impact of the widespread use of the dual share class structure. If mutual fund companies launch ETF share classes en masse, it could put huge demand on the market-making ecosystem. He said all concerns and obstacles facing the use of ETF share classes would be overcome within as little as three years.