The Centre's plan to tighten rules on its fast-growing e-commerce market has run into an internal dissent. According to a report in Reuters, the Ministry of Finance has described some proposals as "excessive" and "without economic rationale". In market news, Indian shares ended flat on Wednesday as major private bank stocks recorded a downfall and offset sharp gains in Coal India. The blue-chip NSE Nifty 50 index closed 0.09% lower at 17,546.65, while the S P BSE Sensex fell 0.13% to 58,927.33.