The Philippine Senate has commenced a historic impeachment trial against Vice President Sara Duterte, marking a significant escalation in the country's ongoing political turmoil.

The proceedings began on Monday afternoon local time, initiating a constitutional process that could result in the removal of the 48-year-old leader from office.

This development introduces fresh political risk for investors monitoring the Philippines, a key emerging market in Southeast Asia.

While immediate market reactions were muted as Asian trading sessions were closed, the trial underscores deepening fractures within the ruling administration.

Political instability in Manila can weigh on investor sentiment, particularly for sectors exposed to domestic policy shifts, such as infrastructure and consumer goods.

The impeachment follows a period of heightened tension between the Duterte and Marcos factions, compounded by recent public protests against institutional corruption.