Quote from TheStudent:
This is incorrect.
ETFs are created when one submits a sufficiently large block of the underlying portfolio to a trust and the trust then turns around and issues ETF units back.
Those units then get traded.
There are no rules that say if you own the ETF you cannot trade the underlying. To the contrary - one MUST be allowed to have positions in both for the product to succeed.
Without arbitrage, the faith of the general public that the ETF will perform in line with the underlying will be rightly questioned and the product will fail.
i guess you have never seen INP. granted it is an ETN but it's close enough.