The National Commodity & Derivatives Exchange (NCDEX), the country’s second-largest commodity futures trading platform, has rationalised transaction charges with effect from September 1. The exchange had three slabs of Rs 2, Rs 1 and Rs 0.50 per lakh of transactions being done. Now, the same has been revised to two slabs with Rs 2.50 per lakh for business generating up to Rs 250 crore.