Cotton yarn prices of major varieties gained further today in Indian textile hubs of Mumbai and Tiruppur. In Mumbai market, the price of cotton yarn increased by Rs. 20-40 per 5 kg, while in Tiruppur, the price rose by Rs. 2-8 per kg. However, traders expect the current upward trend to be short lived as market will get disrupted post GST hike from January 1, 2022.