The New York Board of Trade's active December cocoa contract lost $33 to settle at $1,382 a tonne, after trading from $1,371 to $1,403.
The contract opened weaker at about $1,400 before attracting more aggressive speculative selling when it plowed below the bottom trades over the past four sessions and triggered stop-loss orders.
Among other cocoa futures, March cocoa shed $31 to end at $1,422, while back month cocoa futures contracts declined $31 to $32.