As on 1st February, 2013 Sun, Mercury & Venus in Capricornus, Mars in Aquarius, Ketu in Aries, Jupiter in Taurus, Moon in Virgo and Saturn & Rahu in Libra. Planetary transits in February 2013 are 2nd Mercury -> Aquarius, 13th Sun -> Aquarius and 21st Venus -> Aquarius.
The planetary positions given are at the time of sunrise in India(Kerala) and conjunction effects on markets may be seen on the countries (Asia or Europe or US) over which conjunction take places. It may effect Nifty on that day if the difference is less than 5 degrees and next day otherwise. As per above Nifty may move downwards on 11th & 25th and upwards on 18th.