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I believe that it's referred to as "pump and dump."
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One can pump and dump with tariffs. Tariffs are taxes imposed on imported goods, and countries have long relied on them to support local industries by making foreign products more expensive. However, tariffs can be lower for countries with which the United States has trade agreements. For example, before the U.S. began imposing 25% tariffs on goods from Canada and Mexico, most goods moved between the United States and those countries were tariff-free due to the U.S.-Mexico-Canada trade agreement.

The market can be manipulated by company/sector. Energy companies were up this morning. They could be down by tomorrow. So, you are correct, there's no doubt that the market is being manipulated.