https://www.marketwatch.com/story/spy-versus-spy-the-worlds-biggest-etf-clones-itself-2019-12-23SPY versus SPY? The world’s biggest ETF clones itself
'More ETF shifts of this nature mimic evolution in mutual funds to dual-class share offerings
This SPY is getting a few tweaks. But it should keep the fedora.
State Street Global Advisors launched the first-ever exchange-traded fund, in 1993. And with a little-noted move this December, they may be pioneering yet another phase in the evolution of how investors allocate their money.'