Taiwan’s Financial Supervisory Commission (FSC) is considering implementing short-selling restrictions to stabilize the stock market, following a significant intraday drop on November 6th. The Taiwan Stock Exchange recorded its largest ever intraday point drop of 3,737.67 points, reaching a low of 37,837.05 points. By November 5th, the index had declined 16.55% from its October 6th high of 49,822.55 points, a downturn linked to sell-offs in U.S. AI and semiconductor stocks.
Historically, the FSC has enacted short-selling restrictions five times since 2008. In four of these instances, the Taiwan stock market found a bottom within approximately three weeks of the restrictions being implemented. The sole exception occurred during the 2008 financial crisis, when the market continued to fall by an additional 30% after restrictions were imposed. This historical pattern suggests that such measures are often introduced near market lows, potentially coinciding with periods of severe investor sentiment.
Short-selling restrictions involve limiting the borrowing of stocks for sale. The FSC has a range of tools at its disposal, including increasing margin requirements for short sales, reducing daily limits on borrowed stock sales, prohibiting short sales below the previous day’s closing price, and, in extreme cases, a complete ban on short selling. These measures typically do not affect hedging activities by securities firms for warrants or market making, nor do they restrict futures trading or the sale of existing holdings by investors.
Past implementations have varied. In 2008, restrictions included a ban on short sales below the previous day’s closing price, a temporary complete ban, and a reduced daily price fluctuation limit. In 2015, measures involved increased margin requirements and prohibiting short sales below the previous day’s closing price. During the COVID-19 pandemic in 2020, restrictions included reducing the daily limit for borrowed stock sales and prohibiting short sales below the previous day’s closing price for stocks that fell by more than 3.5%. In 2022, amid rising interest rates and geopolitical tensions, restrictions included reduced borrowed stock sale limits, increased margin requirements, and the reintroduction of the 3.5% rule. Most recently, in 2025, restrictions involved a significant reduction in the borrowed stock sale limit and increased margin requirements.
Academic research suggests that short-selling bans can reduce liquidity and slow price discovery, particularly in bear markets, without necessarily supporting stock prices in the long term. While these restrictions may slow the pace of declines and reduce volatility, their effectiveness in addressing the root causes of market downturns, especially those influenced by global factors, remains a subject of debate. Interpretations of past interventions indicate that the timing of these measures, often during periods of high investor sentiment, might create the appearance of immediate effectiveness as markets naturally tend to rebound from extreme lows.
Uncertainties remain regarding the exact measures the FSC will implement, their duration, and whether other stabilization tools, such as the National Stabilization Fund, will be deployed. The extent to which these domestic measures will influence the market’s direction is also unclear, given the ongoing impact of global market trends, particularly the sell-offs observed in U.S. AI and semiconductor stocks. Historical data shows that when restrictions were lifted in past instances, the index had already rebounded significantly.
Why This Matters
The materials describe a narrow update: The FSC announced measures to stabilize the stock market, including potential short-selling restrictions, following a significant intraday drop in the Taiwan Stock Exchange. The exact measures the FSC will implement in response to the current market downturn.
Broader Context
Source materials place the factual news in this context: The article discusses the potential impact of the FSC’s short-selling restrictions on the Taiwan stock market, drawing parallels with past interventions.
