Adani Enterprises' follow-on public offer (FPO) got a lukewarm response from investors on first day of the issue amid allegations levelled by US-based short seller Hindenburg Research. The Rs 20,000 crore Adani Enterprises FPO, which is the country’s biggest FPO yet, was subscribed just 1 per cent at the end of day one of the issue, data from stock exchanges showed.