Sure, but just to be clear, what is YOUR definition of black swan? Because people are talking here like in the last 6 years there hasn't been any black swan sized events.
1. Out of the 40 largest % moves, 7 happened in 2008-09 and she survived it.
http://en.wikipedia.org/wiki/List_of_largest_daily_changes_in_the_Dow_Jones_Industrial_Average
2. 2010 Flash Crash (second largest point swing), 9% intraday move, she survived it.
http://en.wikipedia.org/wiki/2010_Flash_Crash
3. 2011 August, market moves up and down 5-6% daily, she loses only 4.5%..
So again, her approach has been tested, and now we know that up to 9-11% daily moves (2008 had 2 rallies, 10% and 11%) she is still staying in the States. The flash crash is specially important because it happened fast, and if she has time, she can adjust her position.
Now you might say that 15+% move is the black swan (happened 3 times so far) and it could happen in a moment, instead of relative slowly during the whole day, but when that happens, we will worry about our canned food and ammo supply and not about our funds lost at her funds....
So maybe we should ask Sosnoff next time she is on the show, to ask her about the flash crash...Although even the flash crash had its warning, because 3% of the fall was from the morning and only 6% fell at the flash part...