Sounds like a Hollywood screenplay. But like many screenplays, it's all rather implausible. Although an evil cabal of right-wing financiers could bet on a movie being a flop, there's not a whole lot they can do to guarantee that it will be a flop (see, e.g.
, The Producers
). Furthermore, if they do too much to make sure it's a flop, then either the movie won't be released (which would invalidate their futures contracts) or else everyone in the movie and investment communities would get wind of it and they would all "short" the movie as well, which would either cause the exchange to stop trading in the future or else it would cause the price to collapse, and then the cabal wouldn't make any money on its scheme.
Frankly, there are lots of easier ways for an evil cabal to ruin someone like Oliver Stone than to take out futures contracts against his next movie's box office performance. I'm not sure, however, if an evil cabal could do a better job of ruining Oliver Stone than Oliver Stone seems to be doing himself.