Top brokerages, from Jefferies to Citi, have come out with interesting stock calls on a variety of sectors.Revenue downgrade by Accenture and its impact on Indian IT companies is among the key developments to follow today. The NSE Nifty50 ended 172.85 points, or 0.79%, higher at 22,011.95, while the S&P BSE Sensex was up 590.60 points, or 0.82%, at 72,692.29.