Abolition of Financial Investment Income Tax: Expected Liquidity Inflows and Market Outlook in South Korea

Abolition of Financial Investment Income Tax: A Turning Point for Easing the 'Korea Discount'

The potential abolition of the Financial Investment Income Tax (FIIT), which has acted as a primary source of uncertainty in the South Korean stock market for years, is becoming highly probable. As of August 19, 2026, the increasing likelihood of bipartisan agreement and subsequent passage through the National Assembly signals a fundamental shift in the supply and demand dynamics of the domestic capital market. The FIIT was designed as a comprehensive tax levied on capital gains exceeding a certain threshold across various financial instruments, including equities, bonds, and mutual funds. Since its initial proposal, it has been the epicenter of an intense debate, caught between the justification of enhancing tax equity and practical concerns of severely contracting the capital market.

The current legislative movement toward abolition is interpreted as a strong policy commitment to overcome the persistent 'Korea Discount'—the chronic undervaluation of South Korean equities—rather than a simple tax code revision. Market analysts assess that this will serve as a critical trigger to attract the massive liquidity of retail investors, who had previously redirected their funds to overseas markets such as the U.S. due to potential tax burdens, back into the domestic stock market.

Restoring Investor Sentiment and Eliminating Tax Uncertainty

Unpredictable uncertainty is the most avoided factor among market participants. The prolonged political and policy tug-of-war surrounding the suspension and potential repeal of the FIIT has acted as a severe deterrent to the long-term investment sentiment of domestic investors. The ambiguity of taxation standards, the complexity of withholding methods, and the fear of a potential drop in after-tax expected returns exerted continuous downward pressure on the portfolio construction of both high-net-worth individuals and general retail investors.

Should the abolition of the FIIT be legally finalized, market participants will enter an environment where they can shed complex tax risks and focus entirely on generating returns and conducting fundamental corporate analysis. This will serve as a vital structural catalyst, encouraging a shift away from volatile, short-term trading patterns reliant on capital gains and thematic stocks, toward sound value investing based on intrinsic corporate fundamentals and long-term earnings growth.

Changes in Market Dynamics: The Potential U-Turn of Outflowing Capital

In recent years, direct overseas equity investments by South Korean retail investors have recorded unprecedented, explosive growth. According to statistical data from the Korea Securities Depository, domestic investors' holdings of foreign equities have continually broken all-time highs, highlighting a massive outflow of national wealth. Underlying this massive capital migration—aside from the dominant earnings growth of global Big Tech companies—was the declining relative attractiveness of the domestic market and the prolonged uncertainty surrounding the FIIT and the broader tax regime.

Expectations of a Liquidity Rally Focused on KOSDAQ and Growth Sectors

Market experts project that the abolition of the FIIT will bring immediate and positive improvements to liquidity, particularly in the KOSDAQ market and small-to-mid-cap growth sectors like technology and biotechnology, where the trading volume of retail investors is overwhelmingly dominant. The KOSDAQ market inherently exhibits the highest elasticity to retail capital flows and news of tax relief. Furthermore, the structural phenomenon of massive year-end sell-offs—routinely executed to evade major shareholder capital gains tax requirements—is highly likely to be mitigated. This will significantly contribute to reducing the extreme, often unfounded, volatility seen at the turn of the year, fostering a stable upward price trend that converges with fundamentals.

Historically, whenever tax relief or transaction tax reduction policies were announced in the South Korean market, there was a statistically verifiable correlation between the increase in retail investors' customer deposits at brokerages and a surge in average daily trading volume across the broader market. The momentum from the FIIT abolition holds ample potential to orchestrate a similarly rich, if not stronger, liquidity-driven market environment.

Comprehensive Outlook: Creating Strong Synergy with the Corporate Value-up Program

While the abolition of the FIIT is undeniably a highly positive catalyst for domestic market liquidity, it is not a panacea that unconditionally guarantees a long-term structural bull market. Various fundamental variables—including the uncertainty of global macroeconomic indicators, the pace of interest rate cuts by major central banks such as the U.S. Federal Reserve, and the actual earnings realization of export-driven domestic listed companies—will continue to act as the core determinants of the KOSPI's direction.

The most crucial point to observe is that the abolition of the FIIT can create explosive synergy when coupled with the 'Corporate Value-up Program,' currently being driven as a core mid-to-long-term initiative by the government and financial authorities. When companies' voluntary efforts to enhance shareholder return ratios (e.g., expanding dividends, retiring treasury shares) and improve corporate governance are combined with the tax exemption benefits resulting from the FIIT abolition, the domestic stock market can achieve a genuine multiple rerating. Therefore, prudent investors at this juncture should avoid momentum investing that merely piggybacks on short-term policy boons. Instead, a strategic, data-driven approach is required to select blue-chip companies that demonstrate consistent improvements in Return on Equity (ROE) and an active commitment to enhancing shareholder value.