Futures contracts of key components of the edible oil basket, barring soybean, traded lower on domestic exchanges due to tepid demand in spot markets. Prices had been on a decline over the last eight trading sessions due to expectations of higher new-crop arrivals. Refined soyoil contracts on NCDEX and crude palm oil on MCX fell due to sluggish purchases from bulk buyers as most have replenished their inventories ahead of Diwali