Raghuram G. Rajan, who warned of a credit crisis in 2005 before it hit, is now cautioning that trade wars when combined with a build-up in leverage and high asset prices could result in a toxic mix that dragged global growth.

“We are all very well aware that two things have built up, which had built up before the previous crisis, leverage and asset prices,” Rajan, a former governor of the Reserve Bank of India, said in a Bloomberg Television interview Thursday. “Trade is an issue for the world to be concerned about. It is extremely important that we have good outcomes there. By all means negotiate, but don’t pull the nuclear trigger there.”

While global growth has been strong in recent years, the concern is how long can it continue, and whether elevated asset prices are justified on the basis of it, Rajan said at Jackson Hole, Wyoming, the same place where he warned of credit risks in 2005. Moves by the U.S. or China on trade threaten that growth at a time when underlying conditions are fragile, and some emerging market nations are highly levered, he said.

The U.S. and China returned to the negotiating table this week after more than two months, but a lack of progress after two days of talks renews the threat of escalation in the trade war. While U.S. stock prices hit a new high this week, emerging market gauges have fallen, with the Shanghai Stock Exchange Composite Index dropping about 17 percent year to date.

Turkey and Argentina have experienced asset routs this year, though “my sense is that it is not a systemic issue yet among emerging markets,” according to Rajan. Tariffs on China, however, have potential ripple effects for other emerging market nations, many of whom are dependent on trade and export directly or indirectly through China, he said.

Emerging market countries like India and Brazil that are heading into elections should focus on maintaining macro-economic stability, added Rajan. For India, the rupee’s recent fall isn’t too worrying, and is attributable in part to overall “dollar strength,” he said. The currency hit an all-time low of 70.3950 against the greenback on Aug. 16, and is the worst performing major Asian currency so far this year.