I have spoken with many brokers regarding "Short Selling", and I get the same answers from all of them. Short selling can only occur in taxable accts. w/margin accts. IRA's have no margin accts. therefore any shares you have in those IRA's cannot be shorted. Requesting a Paper Certificate of shares you don't want shorted will prevent shorting since they are no longer in control of the brokerage house.
As far as requesting the brokerage house to restrict your shares from being shorted, the answers I garnered were for the most part ambiguous. Obviously, they realize significant revenue with this practice.
Naked shorting is unlawful, but apparently not of much concern to be vigorously challenged.
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