Reliance Industries shares settled 11.6 percent higher on Monday, marking their biggest single-day gain in more than six years, as analysts remained positive on the stock, citing consistent improvement in the company's oil-to-chemicals (O2C) segment over the past two quarters. Reliance Industries shares could rise to Rs 1,700 over the next 24-36 months, implying an upside of nearly 46 percent from Friday’s close, according to Ajit Mishra, an analyst at Religare Broking.