周二，韩国证券交易所运营商在KOSPI指数大幅下跌后启动了卖方侧边停牌机制（Sidecar）。该举措暂停了程序化交易五分钟。
7月28日上午9:06左右，在KOSPI 200股指期货指数下跌5%或以上并持续至少一分钟后，韩国证券交易所运营商采取了这一措施。受对人工智能过度投资的担忧影响，半导体股跌幅扩大，导致KOSPI指数在上午9:08之前下跌超过5.69%。
韩国交易所表示，KOSPI上市股票的程序化交易被暂停了五分钟。卖方侧边停牌机制在这些条件下会自动触发，旨在稳定市场。
此次下跌紧随科技权重股的抛售之后。报告中未提供关于指数回升的进一步细节。
社交媒体平台X上的初步反应指出，KOSPI指数的剧烈下跌触发了韩国交易所的卖方侧边停牌机制，导致程序化交易暂停五分钟。用户强调了韩国市场以及三星（Samsung）和SK海力士（SK Hynix）等半导体股票的波动性。一些人对这种“卡通市场”般的表现以及对全球科技行业的潜在影响表示怀疑。其他人则提供了关于人工智能交易平仓的背景事实更新。
The cartoon "market" that is Korea is back at it.
— zerohedge (@zerohedge) 2026年7月28日
*SOUTH KOREA'S KOSPI INDEX FALLS 6.1% TO 6,343.87
*KOREA EXCHANGE ACTIVATES SIDECAR TO HALT KOSDAQ PROGRAM SELLING
KOSPI sidecar triggered; KOSPI200 (6.1%)
— Alphatica (@alphaticaio) 2026年7月28日
They ran out of cash. $SPY $QQQ
KOSPI sidecar activated
— MacroEdge (@MacroEdgeRes) 2026年7月28日
-7% #MacroEdge
Kospi Index down 6.1%..
— Mitchell Martan | TLI (@MitchMartan98) 2026年7月28日
*KOREA EXCHANGE ACTIVATES SIDECAR TO HALT KOSDAQ PROGRAM SELLING
More halts in Korea. Expect more volatility tomorrow in AI land. $SNDK $MU $NBIS $AMD $NVDA
The AI infrastructure trade is violently unwinding.
— Smith (@SmithExecution) 2026年7月28日
South Korea’s KOSPI just triggered a sell-side sidecar (circuit breaker) after plunging over 6.4% on the open.
The heavyweights are dragging the entire index down:
• Samsung: -7.6%
• SK Hynix: -9.3%
Wall Street is…
由 AI 报道 AI 生成的图像
South Korea's bourse operator activated a buy-side sidecar for the KOSPI on Wednesday after the index surged sharply, suspending program trading for five minutes.
South Korea's benchmark KOSPI index tumbled more than 5 percent on July 2 after heavy selling in semiconductor shares, prompting the Korea Exchange to activate a sell-side sidecar.
由 AI 报道
South Korea's bourse operator activated a buy-side sidecar for the KOSPI on Monday after the index spiked on news of a U.S.-Iran peace deal.
Seoul shares plunged nearly 9 percent on Monday as investors sold technology stocks amid renewed Middle East tensions. The benchmark KOSPI fell 669.01 points to close at 6,806.93.
由 AI 报道
Seoul stocks opened sharply lower on Friday as investors paused after a tech rally amid uncertainty over the U.S.-Iran peace deal.
Seoul stocks took a breather on June 19 after a six-day surge, closing lower on profit-taking amid revived Iran uncertainties.
由 AI 报道
South Korean stocks opened sharply lower on Wednesday, tracking overnight losses on Wall Street and uncertainties over peace talks between the United States and Iran.