SRL for [adds up]: It all [adds up] to a barrier to American - style index arbitrage , the most popular form of U.S. program trading that seeks to exploit brief differences between prices of stocks in New York and the price of a futures contract in Chicago based on those stocks .
ARG-1: It | ARG-2: to a barrier to American - style index arbitrage , the most popular form of U.S. program trading that seeks to exploit brief differences between prices of stocks in New York and the price of a futures contract in Chicago based on those stocks