Mars in the 2nd house (Dhana, the house of wealth) brings the significations of Mars, namely energy & courage, younger siblings, land & property, into the area of wealth, family, speech and the resources you gather. The 2nd house governs accumulated wealth, family, speech, food & values.
Results of Mars in the 2nd House
Mars is a malefic planet, so here it tends to bring anger, impulsiveness, accidents, conflict and disputes over property focused on wealth, family, speech and the resources you gather.The exact result depends on which sign Mars occupies here and the aspects it receives.
When It Activates
These results typically surface during the Vimshottari mahadasha or antardasha of Mars, and when transiting planets trigger the 2nd house. A well-placed Mars here supports financial stability, a supportive family and pleasant, truthful speech; when afflicted it can indicate money troubles, family friction and harsh or careless speech.