Looking at your Sons chart, he is Capricorn Lagan, Rashi is Scorpio. Venus rules the 5th house of speculation, investment and posited in 11th house of gains. Rahu aspects the 5th house not good. The chart has Kaalsarp dosha not good. Speculative gains are indicated due to Venus position, but it will be in the ling run. Invest in good stocks only for long terms gains. Mutual funds can be a better option. Presently Mercury, Jupiter and Saturn move retrograde, and Venus is combust, avoid investment till this period gets over.