Benchmark Tokyo rubber futures plunged more than 3 percent to a one-week closing low on Wednesday, tracking weaker Shanghai futures and as investors took profits, while some traders stayed on the sidelines ahead of the third US presidential debate.The TOCOM rubber contract for March delivery ended 6.3 yen, or 3.4 percent, lower at 176.7 yen ($1.71) per kg on Wednesday, the lowest close since October 11.
The most-active rubber contract on the Shanghai futures exchange for January delivery tumbled 490 yuan to close at 13,760 yuan ($2,042.76) per tonne, retreating from a nearly six-month high hit earlier this week. The front-month rubber contract on Singapore's SICOM exchange for November delivery last traded at 146.0 US cents per kg, down 5.0 cents.