New Delhi, 06 April (NNS): The prices of black pepper improved by Rs 5 to Rs 765 per kg owing to the limited buying from the stockists at the higher level. Recently, the prices have gone down in the same ratio. Both the arrivals held stable at the same level of the previous day in Kochi, whereas, the prices rose by Rs 5 per kg. The trading activities reported to be sluggish due to the ongoing war in Iran. There is no possibility of long uptrend in the spot black pepper prices during the coming days.