Investors of Indian pharmaceutical companies are worried about the prospect of further escalation amid U.S. trade tensions.

The 100% duties apply to "any branded or patented Pharmaceutical Product" except for companies that build manufacturing plants in the U.S., Trump said Friday.

U.S. President Donald Trump announces 100% tariff on branded pharmaceutical imports, pushing for U.S. manufacturing, impacting India's $20 billion industry.

Investors of Indian pharmaceutical companies are worried about the prospect of further escalation amid U.S. trade tensions.