Taiwan Exchange Pledges Market Stabilization as War Risks and TSMC Slump Trigger Selloff

The Taiwan Stock Exchange announced it is prepared to deploy market-stabilization tools if the recent sharp, 'irrational' declines, driven by geopolitical tensions and a selloff in heavyweight tech stocks, persist.

This market volatility is magnified by the TAIEX index's heavy dependence on TSMC, which accounts for over 40% of its value, making it highly sensitive to external shocks like the Iran conflict and rising oil prices.

Taiwanese authorities are referencing a crisis-response playbook established in April 2025, which includes measures like stricter short-selling rules and the potential activation of the National Stabilization Fund.

The Taiwan Stock Exchange (TWSE) has signaled its readiness to intervene if recent sharp market declines continue irrationally.

This announcement on March 9, 2026, comes after a severe selloff in the Taiwanese stock market, known as the TAIEX. The main triggers were external shocks: a geopolitical conflict involving Iran, which caused oil prices to spike, and a general risk-off sentiment across global markets. This was particularly painful for Taiwan because its heavyweight semiconductor companies, especially TSMC, saw significant price drops. With TSMC alone making up about 41% of the entire index, a 3-4% drop in its stock can mechanically pull the entire market down by a large amount.

So, why is the market so vulnerable now? The cause can be traced back to a few key factors. First, the AI-driven stock market rally in 2025 led to very high valuations and crowded positioning in tech stocks. Many investors had piled into names like TSMC, so when a negative shock hit, the rush to take profits quickly turned into a wave of selling.

Second, this pre-existing vulnerability was met with the perfect storm of a major geopolitical event. The Iran conflict and the subsequent oil price surge created macroeconomic uncertainty, making investors worldwide nervous. This external pressure is what turned a potential correction into a sharp, 'irrational' decline, prompting Taiwanese authorities to step in with verbal reassurances.

However, this isn't a new situation for Taiwan. The authorities are essentially dusting off a playbook they created in April 2025. Back then, the market was hit by U.S. tariff announcements, and the government responded with a clear set of tools. These included tighter limits on short-selling, providing liquidity to the market, and ultimately, authorizing the National Stabilization Fund (NSF) to buy stocks and support the market. This historical precedent gives investors a clear idea of what steps might come next if the selling pressure doesn't ease.

In essence, the TWSE's statement is a proactive measure to calm nerves. It reassures the market that authorities are watching closely and have a well-tested plan to prevent a downward spiral, blending lessons from past crises with an understanding of the market's current structure.

National Stabilization Fund (NSF): A state-owned fund in Taiwan used to intervene in the stock market to prevent excessive declines during times of crisis.
TAIEX: The Taiwan Stock Exchange Capitalization Weighted Stock Index, the main benchmark for the Taiwanese stock market, similar to the S&P 500 in the U.S.
Short-selling: An investment strategy where an investor borrows a stock and sells it, hoping to buy it back later at a lower price to make a profit. Regulators may restrict this during volatile periods to prevent downward price spirals.

Taiwan Exchange Pledges Market Stabilization as War Risks and TSMC Slump Trigger Selloff

The Taiwan Stock Exchange (TWSE) has signaled its readiness to intervene if recent sharp market declines continue irrationally.

National Stabilization Fund (NSF): A state-owned fund in Taiwan used to intervene in the stock market to prevent excessive declines during times of crisis.
TAIEX: The Taiwan Stock Exchange Capitalization Weighted Stock Index, the main benchmark for the Taiwanese stock market, similar to the S&P 500 in the U.S.
Short-selling: An investment strategy where an investor borrows a stock and sells it, hoping to buy it back later at a lower price to make a profit. Regulators may restrict this during volatile periods to prevent downward price spirals.