Based on your financial expertise, provide your response or viewpoint on the given financial question or topic. The response format is open.

Can an ETF, open at a price other than what the pre-market was at?
If you're talking about an ETF trading on Arca, it's probably because of the opening auction: The match price is the price that maximizes the volume that can be executed within the Auction Collars. The Core Open Auction will use the match price closest to the closing price of the previous trading day (based on normal market hours) if more than one indicative match price is valid. The core opening auction doesn't really take the opening session activity into account, as you can see - the market runs an auction and whatever price clears the most volume, within certain limits, is the opening print.