Kalanidhi yoga

Kalanidhi yogam occurs in a person's horoscope if Jupiter joins or is aspected by mercury, Venus is either in 2nd or 5th house (Venus in 5th  house gives the best results); Jupiter occupies 2nd or 5th house this gives best results.
In general in a man's horoscope if venus is in 5th house it gives the best results. In a woman's horoscope if venus is in 9th house it gives the best results. So, this yoga occurs even if Venus is in 9th house. Some astrologers believe that Venus when placed in 12th house is also good. So 60% effect occurs if Venus is in 12th house.
A person with kalanidhi yogam in his horoscope will have the following benefits :
1) He is highly-passionate. Jupiter in 5th house makes a person charming, passionate and charismatic
2) He is good-natured. Again jupiter fosters noble qualities in a person
3) He is respected by kings
4) He will own many different conveyances. Venus is the lord of conveyances
5) He will be long lived. He will be free from diseases

As a summary Venus in best position, Jupiter in best position makes a person lead a hale, healthy and happy life.