Earlier quoted context omitted.
I don't quite understand what you're saying. From what I understand when the ETF achieves cash position needed to generate 1 creation unit (usually 50k ETF shares, as you correctly point out), then the fund is absolutely required to purchase underlying shares that index it's tracking requires it to hold. It can't just hold cash and promise to track index nevertheless. Or do you mean that first comes the Creation Unit…
You don't trade cash for the creation unit, you trade one creation unit of shares in the underlying securities. If 1 share of AMSETF is claimed to be equal to 0.5 shares in AAPL and 0.5 shares in MS, you hand 50k shares of AAPL and 50k shares of MS to the managers of AMSETF. They create 50k shares of AMSETF and hand them to you. No cash changes hands (unless cash is one of the underlying assets of the ETF), so the ET…
but from investor point of view it still works as I described - she goes to market, places bid for ETF shares. Then the process splits as following:
a) if there are sellers in the market she gets her shares from them b) if there are no sellers, market makers will still sell her the ETF shares
then once market maker accumulates enough cash from buyers, he purchases/borrows shares needed for exchange for N creation units from ETF trust.
I don't think market makers just go and create ETF shares without there first being demand for them?