When I started researching this topic for our blog, I also saw conflicting info all around and I tried to pin down Gabriel Hernandez of BDO PR on it. He said the law was "corrected." I've asked him for the source.
Even if he is found wrong, provided section 1256 (60/40 tax regime) still works for puerto rican residents, it could still potentially be a type of deal for futures/fx traders, no (13.2% vs. 31.64%)?
Can you ask him about that as well?