The Sindex The Reason Sindex tracks the price of vice: smoking, drinking, snacking, traveling, and more. | In February, President Donald Trump might not have had red-hot economic numbers to point to, but at least he could say gas prices were down 7.3 percent since he took office and annual inflation was at just 2.4 percent. Then Trump started a war with Iran, the Strait of Hormuz closed, and chaos engulfed a big chunk of the world economy.