Korea Exchange weighs short selling ban as $2 trillion rout deepens

South Korea's stock market has lost $2 trillion in value as regulators consider emergency measures to stem the selloff.

The Korea Exchange internally reviewed temporarily banning short selling and lowering daily price limit bands on Wednesday, as a $2 trillion stock market rout pushed officials to consider emergency intervention for the first time since the pandemic.

"We have not received any related request from the government, nor have we reviewed a short selling ban," an exchange official said, while confirming the internal technical review examined system requirements and implementation timelines for both measures.

The Kospi index has erased gains from a months-long rally fueled by foreign inflows, with the selloff accelerating as investors reassessed exposure to Korean equities while global tech sector weakness spread. The review of lower price limit bands — currently set at 30% for Kospi stocks — shows heightened concern about intraday volatility.

A temporary ban on short selling could provide near-term support for battered stocks but risks deterring foreign investors who account for roughly 30% of Kospi trading volume. South Korea previously banned short selling from November 2023 to March 2024, a move that drew criticism from international index providers and contributed to MSCI's decision to keep Korea classified as an emerging market.

The emergency review comes as South Korea's stock boom — one of Asia's best-performing markets in early 2026 — collapses with unusual speed. The $2 trillion in lost market value has erased the gains from a rally driven by expectations of corporate governance reforms under the "Corporate Value-up" initiative and heavy foreign buying of semiconductor and AI-related stocks.

The selloff mirrors a broader rotation out of Asian equities as global investors brace for negative free cashflows at major US technology companies. Alphabet, Amazon, Meta and Microsoft are collectively expected to report negative free cashflows next year, according to market estimates, as their spending on AI data centers outstrips revenue growth. That has hit Korean semiconductor giants Samsung Electronics and SK Hynix particularly hard, given their exposure to the AI supply chain.

The exchange's review of price limit bands — a tool last adjusted during the 2020 pandemic — suggests regulators are preparing multiple layers of intervention. Lowering the bands would slow the pace of declines but could also trap investors unable to exit positions, potentially amplifying losses over a longer period.

South Korea's financial authorities have faced growing pressure to act as retail investors, who make up a significant portion of local trading activity, have seen portfolio values decimated. The government's previous short-selling ban, imposed in November 2023 and lifted in March 2024, was framed as a measure to protect retail investors from predatory short-selling practices. Its removal was followed by a period of heightened volatility.

Whether the current review leads to actual policy action remains uncertain. The exchange's denial of a formal government request suggests internal contingency planning rather than an imminent decision. But the fact that such measures are being studied shows the severity of the market stress.

This article is for informational purposes only and does not constitute investment advice.