How exactly is the “ETF net inflows” figure calculated?
When tracking ETF fund flows, look at the cumulative trend over several weeks. Large inflows or outflows on a single day are often due to an individual institution rebalancing its portfolio.
I think when the premium or discount gets too large, authorized participants can arbitrage by creating or redeeming shares. This pulls the trading price back toward the NAV.
The shares of a spot Bitcoin ETF are backed by $BTC actually held by the issuer.

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