More like Obliteration Day than Liberation Day, at least in the minds of investors.

In a spectacle at the White House Wednesday afternoon marketed as “Liberation Day,” President Trump uncorked a baseline tariff rate of 10% that will go into effect on April 5.

A higher tariff rate will start on April 9 for about 60 countries that the administration considers to be the worst trade offenders.

Some of those nations are important sourcing and business regions for large US companies, such as Apple (AAPL), Nike (NKE), and Walmart (WMT). China, for example, will see reciprocal tariffs of 34%. Vietnam clocks in at 46%. Japan is at 24%.

The reciprocal tariffs are on top of existing duties, such as the 20% Trump imposed on China earlier, bringing the total rate on the country to 54%.

The markets were pounded to smithereens on the news, which sources tell Yahoo Finance came as negative shock. Electronics seller Best Buy (BBY) caught an instant downgrade by Citi as the products on its shelves will likely cost more and send customers to the sidelines.

Wall Street strategists warned the S&P 500 (^GSPC) could chart much lower from its newly depressed level.

And by the close of trading, the carnage was apparent as investors adjusted for possibly sharply lower economic and corporate earnings growth. The S&P 500 closed Thursday down 4.8%, the Dow Jones Industrial Average (^DJI) dropped 4%, and the Nasdaq Composite (^IXIC) shed 6%.

Stocks of companies that are global in nature tanked.

Nike plunged 14%, while Apple, Amazon (AMZN), and Walmart sank 9%, 9%, and 3%, respectively.

“I feel like this is a shoot first, ask questions later environment,” Kace Capital Advisors managing partner and Yahoo Finance Trader Talk podcast host Kenny Polcari said by phone. “So I think this is more of an overreaction. I think it’s just kind of a temper tantrum. A lot of it is algo driven, more than investor driven.”

Polcari added, “If you own high quality names that are getting dislocated just because of, you know, the short-term panic, then it creates an opportunity. So I’m not panicking at all.”

Here’s what sources are telling Yahoo Finance’s newsroom about the tariff impact to certain sectors and asset classes.

Alexandra Canal, senior reporter

Tech stocks plummeted on Thursday, with Apple leading “Magnificent Seven” names lower after falling 9% to erase more than $300 billion from its market cap.

All told, the Mag Seven stocks lost over $1 trillion in value on Thursday.

“Apple produces basically all their iPhones in China, and the question will be around exceptions and exemptions on this tariff policy if those companies are building more operations, factories, and plants in the US like Apple announced in February,” Wedbush analyst Dan Ives said in a note following Trump’s announcement.