The Trump administration's temporary 10% global tariff expires on July 24 (local time), prompting the US Trade Representative (USTR) to implement new tariffs under Section 301 of the US Trade Act. The transition follows a February US Supreme Court ruling that declared existing reciprocal tariffs unconstitutional, leading the administration to apply a 150-day temporary 10% global tariff under Trade Act Section 122. South Korea faces heightened scrutiny as it is subject to both USTR forced labor and overproduction investigations, with a 12.5% additional tariff already announced and potential combined rates exceeding 20%. However, securities industry analysts assess that the 15% tariff cap South Korea secured in July last year through a $350 billion US investment commitment will serve as a critical buffer limiting downside pressure on stocks.
USTR Prepares Section 301 Tariffs Following July 24 Expiration
According to trade authorities and major foreign media on the 23rd, the USTR is scheduled to announce additional tariff measures based on Section 301 of the Trade Act to coincide with the end of the 10% global tariff. The Trump administration imposed the 150-day temporary 10% global tariff using Trade Act Section 122 after the US Supreme Court ruled existing reciprocal tariffs unconstitutional in February. With this deadline expiring on the 24th, the administration is transitioning to Section 301 as a more precise and long-term enforcement mechanism.
The USTR has conducted forced labor investigations targeting 60 economies and overproduction investigations targeting 16 economies since March. South Korea is included in both investigations. Last month, the US announced a 12.5% additional tariff on 45 countries, including South Korea, citing inadequate import blocking systems related to forced labor. If overproduction-related tariffs are added to this figure, the final rate could exceed 20%. Excluding separately tariffed items such as automobiles and steel, most major export products including batteries, chemicals, and machinery fall under direct impact.
South Korea Defends 15% Tariff Cap Through Washington Negotiations
The South Korean government is conducting full-scale diplomatic efforts to maintain the agreed 15% ceiling. Yeo Han-gu, head of the Ministry of Trade, Industry and Energy's Trade Negotiation Headquarters, traveled to Washington as an advance team on the 20th, followed by Minister Kim Jeong-gwan, who will stay in Washington DC from the 22nd to the 25th for final coordination with US Commerce Secretary Howard Lutnick and other officials.
The government plans to actively highlight South Korea's contributions to the US, including the implementation of a $150 billion shipbuilding investment, starting with the opening ceremony of the Korea-US Shipbuilding Cooperation Center in Washington DC on the 23rd. The Blue House stated through a media notice the previous day that "the US government has expressed its position to respect the Korea-US tariff agreement" and is closely monitoring related developments. Wi Seong-rak, Director of the National Security Office, stated on the same day, "There may be additional tariffs through Section 301 and other provisions, but we understand that they generally will not exceed the large tariff rate (15%) agreed upon between South Korea and the US." USTR representative Jamieson Greer publicly stated early last month that he would respect the cap in the trade agreement.
Analysts Assess Limited Macro Impact on South Korean Stocks
The financial investment industry analyzes that the actual damage to the fundamentals and stock prices of major domestic industries from this measure will be limited. The basis is the "15% tariff cap" that the South Korean government secured in July last year by pledging $350 billion (approximately 520 trillion won) in US investment.
Jo Yeon-ju, researcher at NH Investment & Securities, diagnosed, "Although South Korea is exposed to both forced labor and overproduction practices, the actual macro impact will be limited because defensive negotiations will be conducted based on the 15% cap confirmed in the existing trade agreement (ART)." She also evaluated, "There are legal disagreements about the blanket application of Trade Act Section 301 to 60 countries, and if high reciprocal tariffs like in the past are enforced, they may face judicial challenges again, which could reduce enforceability."
Kwon Hee-jin, researcher at KB Securities, also predicted, "It will be difficult to forcefully push through high tariffs in a situation where inflation and interest rate burdens in the US are pressuring financial markets and geopolitical conflicts persist."
However, some in the market point out that it is too early to be relieved even if the 15% cap is maintained. The key is not the absolute tax rate itself but relative price competitiveness compared to competing countries. The Trump administration's irregular use of trade weapons is also an anxiety factor. President Trump recently announced that he would impose a 50% punitive tariff on Canadian products by invoking Section 338 of the Tariff Act enacted in 1930. The fact that the administration finds workarounds using outdated laws such as the Trade Expansion Act, Trade Act, and Tariff Act whenever existing tariff barriers are blocked by court rulings increases the uncertainty of the Korea-US tariff agreement.
FAQ
What tariff changes take effect on July 24?
The US temporary 10% global tariff imposed under Trade Act Section 122 expires on July 24 (local time), and the USTR is scheduled to announce new tariff measures based on Section 301 of the Trade Act to replace it.
What is South Korea's agreed tariff cap with the US?
South Korea secured a 15% tariff cap in July last year by committing to $350 billion in US investment, and USTR representative Jamieson Greer publicly stated early last month that he would respect this cap in the trade agreement.
Why do analysts expect limited impact on South Korean stocks?
Analysts from NH Investment & Securities and KB Securities assess that the 15% tariff cap agreed in the existing Korea-US trade agreement will serve as a buffer limiting macro damage, and high tariff enforcement faces legal challenges and economic constraints from US inflation and interest rate pressures.
