I'm doing a phd in chemistry http://nxxn.site/sitemaps/2.html xsxxc But since the US Federal Reserve determined in 2003 that certain commodity activities are "complementary" to financial activities and therefore permissible Wall Street bankers â Morgan Stanley, Goldman Sachs, and JPMorgan are the biggest players â have been moving aggressively into everything to do with physical commodities including mining, processing, transportation, warehousing and trading.