At the very beginning of the movie, the young woman is sitting on the beach and has a scarf around her shoulders/coat. It appears and disappears -
Ben tells Guys that he needs a team to hack the market, telling Guy hacking the market is a grey area. Hacking the market is not a grey area, it is illegal.
The postscript of the movie states that, since the creation of the Federal Reserve, there has been, on average, one financial crisis every 10 years. Actually, in the first 75 years of its existence, there has only been one (1929). The 10 (to 15) year cycle of financial crises occurred before the Fed's creation (and returned with Reagan).