Budh (Mercury) mahadasha for Meena (Pisces) Moon sign

In the Vimshottari system a life moves through nine long periods, each ruled by one planet. The planet that rules the period sets the tone of those years: the areas of life that come forward, and the kind of effort that pays.

The Mercury mahadasha lasts 17 years in full. Most people meet it partway through, so the part they live through can be shorter.

Mercury stands for thinking, speech, learning, trade and writing. Its period tends to favour study, skills, business and anything that runs on communication and quick judgement.

Counted from Pisces as the first house, Mercury rules Gemini and Virgo, your 4th and 7th houses. During its period the matters of both come forward:

The 4th house is home, mother, property, vehicles and peace of mind. Its lord's period tends to bring matters of the house and family to the front, including moves and changes at home.

The 7th house is partners, marriage and dealings with other people. Its lord's period tends to bring partnerships forward, in marriage and in business, and to teach through other people.

Mercury is neither friend nor enemy to Jupiter, the lord of Pisces. Its period tends to give what you put into it; the planets' places in your own chart decide more than this relationship does.

Which mahadasha you are in, and when it began, depends on the Moon's nakshatra at the moment you were born, so it is personal to you. Even within the Mercury mahadasha, where the planet sits in your own chart and the sub-periods inside it shape the years more than your Moon sign alone.