Reliance Infra share price: The stock slumped 20 per cent to hit its lower price band of Rs 227.40. Today's plunge in the share price came after it was reported that the Supreme Court of India has overturned its prior ruling that compelled the Delhi Metro Rail Corporation (DMRC) to pay an arbitration award of around Rs 8,000 crore to Reliance Infra's subsidiary, Delhi Airport Metro Express Pvt Ltd (DAMEPL).