The Tokyo Commodity Exchange Inc. (Tocom) on Oct. 9 listed futures contracts for technically specified rubber 20 (TSR20), expanding its operations in the rubber market. For contracts lasting until April, TSR20 prices per kilogram opened at 163.5 yen ($1.46) for the day before closing at 160 yen, with a high of 163.5 yen and a low of 159.8 yen. Trading…