Check your trade ticket first to see what capacity your broker/dealers acted when you did your trade. If the ticket is marked with your broker/dealer acting as "agent", then they didn't sell you anything; they merely facilitated a trade between you and someone else. That "someone else" is a another story. However, if you're going to be accusing broker/dealers of knowingly selling something "they don't have", then at the very least you need to stick to tickets that were done with the broker/dealer acting as "principal".
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