Budh chaar mein, banda vyapar mein.
Mercury in the 4th, the person is in business.
The 4th house is the house of the mind, peace, and the mother. Mercury (Budh) is the planet of commerce, trading, intellect, and calculation.
When Mercury sits in the 4th house, the person's core mindset becomes entirely commercial. Dr. Sharma states a simple, absolute Lal Kitab rule: This person is born for business ("banda vyapar mein").
They have a natural, intuitive grasp of buying, selling, and making a profit. Even if they are forced into a 9-to-5 job, their mind will constantly calculate side-hustles and business ideas. They will only find true mental peace when they are running their own trade.