Jim Cramer's weighing in on the weakening yuan and the U.S.-China trade war.

On Monday morning, the Chinese yuan weakened below the 7-per-dollar level for the first time since May 2008.

The People's Bank of China let the so-called on-shore yuan fall past the psychologically important threshold of 7.00 against the greenback in early Monday trading, citing in a statement "unilateralism and protectionism," as well as the expectation of additional tariffs from the United States, reported TheStreet's Martin Baccardax.

President Trump weighed in on the issue saying that the weakened yuan was "currency manipulation."

Cramer's got his eye on seven sectors Monday morning.

He wrote about them in his Real Money column early Monday.

Here's a sneak peek of his column:

"We know that the industrials that do business worldwide, not just China, will feel the pain of a trade war that will now reverberate around the world -- especially in Germany, where auto exports to China will be slowed, perhaps dramatically," he wrote.

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