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How does shorting ETFs work? What are the costs and tax implications?
No, the expense ratio would be something you wouldn't be charged. If you bought shares of the ETF long, then the dividends are usually reduced by the expense ratio if you wanted to know where to find that charge in general. You would have to make up for any dividends the underlying stocks as part of general shorting since the idea is that once you buy to put back the shares, it has to appear as if they weren't missing in the first place. No, the authorized participant would handle changes to the underlying structure if needed.