Mercury is the smallest Planet in the solar system. It governs and represents:
Spech, wit, intelligence, nerves and nervous ailments, humour, trade, businesses of various kinds, stock market and shares, green-coloured objects, etc. It partakes of the physical and astrological characteristics of the planet which happen to conjoin it or to aspect it. (To conjoin means to lie in the same sign of the zodiac and to impart direct influence because of physical proximity; to aspect is to cast direct influence because of physical proximity; to aspect is to cast direct influence from the opposite zodiac sign or any other nearer zodiac sign.) Mercury is like quicksilver-changeable and sharp. It is crisp and quick acting in character and influence.