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Does SIPC protect securities purchased in foreign exchanges?
I have received a response from SIPC, confirming littleadv's answer: For a brief background, the protections available under the Securities   Investor Protection Act ("SIPA"), are only available in the context of   a liquidation proceeding of a SIPC member broker-dealer and relate to   the "custody" of securities and related cash at the SIPC member   broker-dealer. Thus, if a SIPC member broker-dealer were to fail at a   time when a customer had securities and/or cash in the custody of the   SIPC member broker-dealer, in most instances it would be SIPC's   obligation to restore those securities and cash to the customer,   within statutory limits. That does not mean, however, that the   customer would necessarily receive the original value of his or her   purchase. Rather, the customer receives the security itself and/or the   value of the customer's account as of the day that the liquidation   commenced. SIPC does not protect against the decline in value of any   security. In a liquidation proceeding under the SIPA, SIPC may advance   up to $500,000 per customer (including a $250,000 limit on cash in the   account). Please note that this protection only applies to the extent that you   entrust cash or securities to a U.S. SIPC member. Foreign broker   dealer subsidiaries are not SIPC members. However, to the extent that   any assets, including foreign securities, are being held by the U.S.   broker dealer, the assets are protected by SIPC. Stocks listed on the   LSE are protected by SIPC to the extent they are held with a SIPC   member broker dealer, up to the statutory limit of $500,000 per   customer. As I mentioned in the comments, in the case of IB, indeed they have a foreign subsidiary, which is why SIPC does not cover it (rather they are insured by Lloyds of London for such cases).