As on 1st August 2015 Sun, Mercury & Mars in Cancer, Jupiter & Venus in Leo, Rahu in Virgo, Saturn in Scorpio, Moon in Capricornus and Ketu in Pisces. Planetary transits in August: 4th Mercury -> Leo, 13th Venus -> Cancer, 17th Sun -> Leo, 23rd Mercury -> Virgo.
The planetary positions given above are at the time of Sunrise in India(Kerala) and Moon's conjunction effect on markets may be seen in countries (Asia / Europe / US) where trading take places at the time of conjunction(0°). When the angular difference between the Moon and the planet is more than 5 degrees or conjunction occurs in Rasis(constellations) other than the Sun's Rasi, there may be a delay up to 24 hours in the conjuntion effect according to their positions (Note: expect only eighty percent accuracy in assumptions based on Moon's conjunction with Mars(-), Venus(-) and Jupiter(+) as some other astro factors may also influence the market). As Moon conjuncts with Mars and Venus on 13th & 14th respectively Nifty may move downwards from 13th to 15th. As Moon conjucts with Jupiter on 15th, Nifty may improve in the later part of the day.