*Wall Street experienced a sharp decline on Friday after U.S. President Donald Trump proposed a 50% tariff on the European Union, and Apple Inc. shares also fell following his warning that the company would be subject to tariffs if its phones were not manufactured in the United States.*

*Trump posted on the Truth Social platform, stating, "The primary purpose of the EU's formation was to take advantage of the United States in trade, which makes it very difficult to deal with."*

*He also previously stated in another post that Apple (AAPL.O) would face a 25% tariff if iPhones sold in the U.S. were not produced domestically.*

*Apple's stock dropped nearly 3.3% in premarket trading.*

*Andre Bakhos, Managing Director at Ingenium Analytics LLC, stated, "On the surface, the impact of tariffs is significant for both sides... the market does not like uncertainty."*

*“Ultimately, if we can get the European Union to come to the table, it will be beneficial for the United States and other countries.”*

*Wall Street's "fear index"—the CBOE Volatility Index (.VIX)—soared to its highest level in over two weeks, last reported at 24.6 points.*

*Most large-cap and growth stocks declined, with Amazon (AMZN.O) and Nvidia (NVDA.O) each falling about 3%.*

*Chip stocks, including Advanced Micro Devices (AMD.O) and Intel (INTC.O), as well as airline stocks such as American Airlines (AAL.O), were among the hardest hit, each dropping around 2%.*

*Deckers Outdoor Corporation (DECK.N), the maker of UGG boots, forecasted that first-quarter net sales would fall short of expectations and announced it would not provide an annual outlook due to macroeconomic uncertainty caused by tariffs. The stock subsequently plummeted nearly 20%.*

*Amid rising concerns over increasing debt levels, which pushed up U.S. Treasury yields, all three major stock indexes saw significant declines this week. Initial fears were sparked when Moody's downgraded the U.S. credit rating late last week.*