Ahead of today's budget session Sensex opened at 36,232.48, up by 188.42 points. Nifty recorded a high of 44.45 points at 11,114.10. Union Finance Minister Arun Jaitley will be presenting the Economic Survey later in the day. The event will precede the presentation of this year's Budget on February 1. The Economic Survey is the Finance Ministry's yearly document that reviews the economic development of the country in the past year.