Shares of key Asian partners to Apple Inc. (NASDAQ: AAPL) declined on Monday following President Trump’s alarming proposal of a 25% tariff on all imported iPhones. This tariff could extend to every smartphone entering the U.S., raising concerns about potential cost increases and supply-chain disruptions.

The Pressure on Supplier Stocks

• AAC Technologies (OTC: AACAY) saw a dip of 1% in Hong Kong.

• Lens Technology (SZ:300433), Goertek (SZ:002241), and Luxshare Precision (SZ:002475) each slid by up to 1%.

• TSMC (TW:2330) and Hon Hai Precision (TW:2317) in Taiwan also experienced declines.

• In Tokyo, Japan Display (TYO:6740) and Sharp (TYO:6753) also dropped.

• Interestingly, Samsung Electronics (KS:005930) bucked the trend with a slight increase of 0.5%, despite being mentioned in Trump’s tariff threat.

Reflecting the overall sell-off, Apple shares decreased by 3% on Friday.

Why Investors Should Care

As Apple shifts some production to India, uncertainties linger regarding whether these tariff threats will be implemented or postponed again. President Trump previously postponed EU smartphone tariffs until July 9.

For real-time insights into how the Tech sector reacts to geopolitical events, investors should explore the Sector Historical API. It provides historical data and volatility patterns in relation to trade policy announcements.

Evaluating Supplier Dependence

Many Asian suppliers derive a significant part of their revenue from Apple contracts, making their stock performance critical. Investors can analyze the revenue breakdown of each supplier to understand how much their earnings depend on smartphone components versus other divisions.