Budget 2018: Even as the Sensex and Nifty scale new peaks in quick succession, with the 30-share barometer breaching the 36,000 mark for the first time ever, and the broader 50-share Nifty racing past 11,000, the equity markets will keenly watch out for cues from Union Budget 2018 which is to be presented on February 1 by Finance Minister Arun Jaitley.