Impending 2026 Tax Reform Announcement: How Financial Investment Income Tax Uncertainty Impacts the Market

Awaiting the Tax Reform Announcement: A Deepening Wait-and-See Approach

Ahead of the government's tax reform announcement scheduled for late July 2026, a strong wait-and-see sentiment has taken hold in the domestic stock market. With the policy direction regarding the financial investment income tax still unclear, investors are refraining from active trading and reducing their positions. The recent 15% drop in the KOSPI's average daily trading volume clearly reflects this market caution.

Why is the Uncertainty Surrounding the Financial Investment Income Tax a Problem?

The financial investment income tax levies taxes on income generated from financial investment products such as stocks, bonds, and funds. As debates over its implementation, delay, or complete abolition are prolonged, the market is facing direct negative impacts in the following areas.

1. Shrinking Investor Sentiment and Decreased Trading Volume

With taxation standards and rates undecided, capital from high-net-worth individuals—often referred to as 'big hands'—is either exiting the market or staying in standby funds like CMAs and MMFs. According to data from the Korea Financial Investment Association, the balance of standby funds has noticeably increased this month, approaching all-time highs. This is a natural phenomenon of investors seeking to avoid tax risks.

2. Instability in Foreign and Institutional Supply and Demand

Tax reform affects not only domestic retail investors but also the investment strategies of foreign and institutional investors, who are key market players. When retail buying power weakens, the market's downward rigidity decreases, which can provide an excuse for foreign investors to sell further. The foreign net selling rally observed over the past few days is not unrelated to this macroeconomic uncertainty.

Past Tax Reforms and Market Volatility

Looking back at past instances where major tax reforms were discussed, such as the reduction of the securities transaction tax or the tightening of capital gains tax requirements for major shareholders, the domestic stock market experienced clear volatility. Until policies are finalized, uncertainty itself acts as a risk, often causing the market volatility index (VKOSPI) to surge. However, once the details are announced, regardless of whether the news is positive or negative, the market repeatedly demonstrates a pattern of rapidly regaining stability and rebounding on the grounds of 'resolved uncertainty.' Therefore, the current wait-and-see approach can be interpreted as a short-term growing pain. For blue-chip stocks with intact fundamentals, this volatility might instead serve as an opportunity for accumulated buying on weakness.

Key Points to Watch in the Tax Reform Plan

There are two main elements the market is paying the most attention to in this upcoming announcement:

• Potential Increase in the Taxation Threshold: Discussions are ongoing regarding whether the basic deduction amount (currently 50 million won) will be adjusted upwards. If the deduction limit is raised, the market shock could be limited.
• Introduction of Long-Term Investment Benefits: A major point of interest is whether progressive deductions or tax rate reductions will be included to reduce market volatility from short-term trading and encourage long-term investments.

Investment Strategy Amidst Market Uncertainty

Until the policy direction is finalized, a defensive approach aimed at minimizing portfolio volatility is advantageous. Increasing exposure to value stocks with high dividend yields and solid earnings, or expanding indirect investments through pension savings and ISAs (Individual Savings Accounts) with confirmed tax benefits, can be viable alternatives. It is not too late to confirm the market's direction and respond after the tax reform plan is officially announced and the uncertainty is resolved.