New Delhi, March 11 -- Investors in several Tata group stocks are keeping their fingers crossed, following reports that Tata Sons, the conglomerate's investment holding company, is looking at options to avoid taking the initial public offer (IPO) route as mandated by the Reserve Bank of India. The RBI rule that Tata Sons would have to get listed by September 2025 as it has been classified as an upper-layer NBFC, was known for a long time. But investors started buying Tata stocks, Tata Chemicals in particular, after investment banker Spark Capital released a report last Monday identifying Tata Chemicals as the only potential play in the IPO. Tata Chemicals rallied 31% in the last three trading sessions as it was believed to be the biggest be...