Rahul Sharma, Director of JM Financial Services, expects a rebound in the Nifty index, possibly starting next week and continuing into the February series. He advises clients to focus on sectors and stocks that have not corrected, such as PSU banks, metals, IT, and pharma. Sharma believes that the risk-reward becomes favorable for a bounce back at around 21,000 on the Nifty index. He also recommends Tata Power and Nocil as top picks. TRIL and Bajaj Auto are also expected to perform well, while Tech Mahindra presents a buying opportunity.