The U.S. equity market experienced a sharp reversal on Thursday, with the S&P 500 sliding 3.8% to a low that placed the index just above the first‑level circuit‑breaker trigger. The sell‑off was led by artificial‑intelligence (AI) and semiconductor stocks, sectors that had surged earlier in the week following the Democratic Party’s sweeping midterm victories. The decline erased Wednesday’s rally, which had seen the S&P 500 rise 1.6% and the Dow Jones Industrial Average jump more than 1,500 points. According to Decrypt, the move also reverberated into cryptocurrency markets, where Bitcoin fell below $76,000 and leveraged long positions were liquidated for roughly $428 million.

BTC / USD
Source: CoinGecko. Prices are indicative.

Circuit‑Breaker Thresholds Come Into Focus

U.S. exchanges operate three emergency thresholds designed to pause trading when market declines become severe. The first level activates at a 7% drop, corresponding to an S&P 500 reading of 7,150.41 points. Reaching that level before 3:25 p.m. ET would trigger a 15‑minute halt across all equity venues, including the Nasdaq. A second 13% threshold (6,689.09 points) would impose another 15‑minute pause, while a 20% decline (6,150.89 points) would halt trading for the remainder of the day. At the time of reporting, the index had not yet breached the 7% mark, but the proximity of the level prompted traders to monitor the threshold closely, as noted by Decrypt.

AI and Chip Stocks Under Pressure

The technology sector bore the brunt of the downturn. By late morning, the Nasdaq Composite was down nearly 5%, and the broader semiconductor index plunged almost 11%. Nvidia shares slipped more than 6%, while other AI‑infrastructure firms faced similar pressure. Ipek Ozkardeskaya, a senior analyst at Swissquote Bank, told Reuters that investors are anticipating “some scrutiny on this aggressive AI buildout” under a Democratic‑controlled Congress, a sentiment echoed in Decrypt’s coverage. The fear of tighter regulatory oversight on data‑center construction and AI model deployment appears to have dampened enthusiasm for the high‑growth tech names that had powered recent market gains.

Crypto Markets React to Equity Turmoil

The equity sell‑off spilled over into digital assets. Bitcoin, which had recovered after the November election, slipped below the $76,000 mark, erasing its post‑election rally. Decrypt reported that leveraged crypto long positions worth about $428 million were liquidated within an hour of the price drop. While the cryptocurrency market is not directly tied to U.S. circuit‑breaker rules, the correlation between risk‑off sentiment in equities and crypto assets is well documented, and the recent move underscores that link.

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