9th house belongs to Jupiter, which favours Ketu. Ketu in 9th house is considered to be exalted. Such a native is obedient and lucky. It increases ones wealth. If Ketu is benefic then one earns wealth through ones own labour. There will be progress but no transfer. If one keeps gold brick in his house then wealth comes. The son of such a native is able to guess the future. One spends a big part of his life in foreign land. One has at least three sons and if 2nd house is auspicious then Ketu gives excellent results . If Moon is auspicious then the native helps his mother's family.
If Ketu in 9th house is malefic then the native suffers from urinary problems, pain in back, problem in legs. The native's sons keep on dying.
(1. Keep a dog. 2. Establish a rectangular piece of gold anywhere in the house. 3. Wear gold in the ear. 4. Respect elders, specially father- in- law.