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Tokyo Commodity Exchange (TOCOM) futures plunged more than 4% on Tuesday, their most in 22 months, as concerns over the potential economic fallout from an outbreak of a new flu-like virus in China weighed on prices.
TOCOM's rubber contract for June delivery finished 8.4 yen, or 4.2%, lower at 193.0 yen ($1.76) per kg, marking the biggest one-day drop since March 2018. It touched the lowest since Dec. 23 of 192.2 yen earlier in the session.
The most-active rubber contract on the Shanghai futures exchange for May delivery tumbled 345 yuan to finish at 12,620 yuan ($1,827) per tonne.
The front-month rubber contract on Singapore's SICOM exchange for February delivery last traded at 147.2 US cents per kg, down 2.3%.