The CBI on Monday took over the probe in the Vyapam scam, the massive admission and recruitment scandal, which has rocked Madhya Pradesh and dented the credibility of the state's BJP government.
One of the most telling images from the frenzied media coverage of India's corruption scandals in recent months was billionaire telecoms tycoon Anil Ambani emerging from the CBI headquarters after questioning.
Telecom analyst Sanjay Chawla of Antique Stock Broking said the investigations will remain as an overhang on telecom companies.