Big movers on D-Street: What should investors do with Adani Ports, Nalco and NTPC?

Sensex rose 230 points. Adani Ports, Nalco, and NTPC saw price movements. Analyst Riyank Arora suggests buying opportunities. He recommends Adani Ports with a stop loss of 990. Nalco is a buy with a stop loss of 215. NTPC is also a buy, with a stop loss of 340.