With dual listing, "misbehavior" on one market is compensated by arbitrage between the markets - theoretically, anyway. As an American I don't want to be booted out of SIAF because it moves to Sweden, I'm not sure that would happen considering First North is actually a NASDAQ OMX company. But something like this did actually happen to me one time. /Sidney
I can´t see how it would provide protection really but I am no expert of US shorting schemes either.
What I do know is that I been holding quite a few dual listed stocks and you get another set of troubles, the "hedgefunds" doing all sorts of plays in both directions usually exploits the arbitrage situation. It is usually rather easy spreading a rumour late US pushing the stock downwards quick, causing a panic in Sweden next morning and vice versa...