Mercury in Scorpio: Themes, Strengths, and What It Tends to Mean

What Mercury signifies

Mercury is the kāraka of buddhi (intellect), speech, commerce, learning, and skilful communication.

Mercury in Scorpio

Scorpio is a water, fixed sign of depth, intensity, and transformation through what is hidden, ruled by Mars/Ketu. Placed here, Mercury's significations tend to express through depth, intensity, and transformation through what is hidden. This is a neutral dignity — the placement's expression depends on the rest of the chart, which is exactly what makes your own chart worth seeing.

How to read this

Treat this as a classical tendency, not a fixed verdict. The house this planet occupies, the aspects it receives, and the daśā period you are running all shape how it actually expresses — which is precisely why a generic sign reading can only take you so far, and your own chart says far more.