This yoga occurs when one of the planets participating in the yoga is lord of the sixth, eighth or twelfth house. These are dushtana houses that generally have an unfavourable influence.
In most cases, the lord of the sixth, eighth or twelfth house will be strengthened by the benefic influence of the other planet.
However, the other planet involved in this yoga is always damaged.
Example: When Sagittarius is on the ascendant, the Moon is lord of the eighth house and the Sun is lord of the ninth house. Should the Moon be in Leo and the Sun in Cancer, then we have a dainya parivartana yoga. In this case, the Sun will be damaged because it has to battle with the difficult energy of the eighth house. The Moon however, will get a boost from the influence of the favourable ninth house energy.
A possible interpretation for the lord of the eighth house when it is favourably influenced: Perhaps the person involved here will receive an inheritance (eighth house) from his father (ninth house), or he may be a teacher (ninth house) of psychology (eighth house).
A possible interpretation for the lord of the ninth house when it is unfavourably influenced: Probably this person’s father (ninth house) has had a problematical life because the lord of the ninth house has been affected by the influence of the lord of the eighth house, which has to do with all kinds of problems. In addition, it is possible that his good fortune (lord of the ninth house) will be tainted (influence of the lord of the eighth house).
JV ASTROLOGY 