The Indian rupee weakened past 87 to the U.S. dollar for the first time ever on Monday in the wake of a slump in Asian currencies and equities after U.S. President Donald Trump's tariff threats became a reality.

The rupee breached the key 87 per dollar mark on Monday as the dollar strengthened after US President Trump slapped tariffs on Canada, Mexico and China. The dollar index surged by 1.35 per cent to 109.83. It measures the strength of the greenback against a basket of six major currencies.

As US President Donald Trump has unleashed a tariff war on the world, the Indian Rupee has fallen to an all-time low of over Rs 87

The Indian rupee is poised to open at an all-time low against the dollar on Monday, tracking a slump in Asian currencies and risk aversion on worries over a trade war between the U.S. and its trading partners.

The Indian rupee breached the 87 per dollar mark for the first time today, a steep fall from its previous close of 86.61/$ on January 31. The depreciation can largely be blamed on rising global trade tensions, sparked by new tariffs imposed by US President Donald Trump on imports from Mexico, Canada, and China.

This comes amid investor worries over potential trade war between US and its trading partners following tariff threats.

The dollar index was up 0.3% at 109.8, while Asian currencies weakened, with the offshore Chinese yuan down 0.5% at 7.35 per US dollar.