The Molbio Diagnostics IPO entered its second day with strong investor interest, as the grey market premium (GMP) climbed to 17% from 15% earlier. The issue was subscribed 83% on Day 1, with retail investors subscribing to 77% of their quota. The Rs 939.70-crore IPO comprises a Rs 200-crore fresh issue and Rs 739.70 crore OFS.