منذ 49د
China Tech Index Falls 40% as Bitcoin Climbs 27% in Same Period
China's STAR50 technology index ended Oct. 26, 2026, almost 40% below its July closing high. Tencent's closing-price series fell from 2,185.83 on July 9 to 1,315.5 on Oct. 26, a loss of 39.8169% over 71 subsequent Chinese trading sessions. Reuters estimated the associated market-value loss at roughly $480 billion, a separate measure from the index-level calculation. Bitcoin gained 26.6%, about 27%, between the same July 9 and Oct. 26 endpoints. STAR50 comprises 50 large, liquid securities listed on Shanghai's technology board, so the decline reflects equity repricing, not China's entire AI industry.
A comparison using Yahoo Finance histories examined every overlapping 71-session return for US indexes through Oct. 26. STAR50's decline ranked among the most extreme losses in that historical sample, including against semiconductor stocks. Overlapping periods share observations and cluster around crises, so the observed frequencies are not independent probabilities of a crash. The calculation measures changes between closing prices at equally spaced trading-session endpoints, not the largest decline within each period. It also does not treat a four-month decline as equivalent to an entire bear market lasting several years.
Bitcoin has fallen alongside broader markets in selected earlier episodes. From Feb. 19 to March 23, 2020, the Nasdaq 100 dropped 27.9% and Bitcoin fell 33.4%. From Jan. 3 to Dec. 30, 2022, the Nasdaq 100 lost 33.7% and Bitcoin declined 64.3%. Federal Reserve tightening and crypto-specific stress involving FTX overlapped in 2022, preventing that period from isolating technology stocks' effect on Bitcoin. During the DeepSeek episode, from Jan. 24 to Jan. 27, 2025, the Nasdaq 100 fell 3%, semiconductor stocks lost 9.2% and Bitcoin declined 2.6%. Reuters reported an approximately 6% intraday Bitcoin decline that Monday, using a different observation time from the closing-price calculation. Each episode matches calendar endpoints across assets, but the episodes span different durations. US stock trading ends in New York, whereas Bitcoin daily bars use UTC dates, preventing these comparisons from establishing exact intraday response times.
Between July 9 and Oct. 26, the CSI 300 declined 15.9%. The Nasdaq 100 fell 1.5% over that period. US semiconductor stocks lost 14.5% over the same interval. Bitcoin's largest closing peak-to-trough decline within that window was 7.6%. The Nasdaq 100's largest closing peak-to-trough decline within the window was 8.8%. Bitcoin and the Nasdaq 100 had a daily log-return correlation of about 0.63 across 30 matched US market dates ending Oct. 26, compared with 0.36 for the sample ending July 9. The positive correlation measures daily co-movement within the sample, showing that divergent cumulative returns do not rule out short-term links.
The IMF describes margin calls, concentrated positioning and investor withdrawals as mechanisms that can force leveraged funds to sell holdings across markets. A broader demand for cash could similarly outweigh demand specific to Bitcoin. The central risk for crypto investors is whether China's equity decline produces wider financing pressure that reaches Bitcoin. Farside recorded $636 million in net withdrawals from US spot Bitcoin ETFs on Oct. 22. Farside recorded $110 million in net inflows on Oct. 26. US high-yield credit spreads narrowed from 3.4% on Oct. 22 to 3.3% on Oct. 26. The broad dollar index changed little across the latest available readings, covering Oct. 19 to Oct. 23. SOFR stood at 3.93% on Oct. 26, three basis points above the Federal Reserve's 3.9% reserve-balance rate. That comparison pairs a market borrowing rate with an administered policy rate and captures only one component of dollar funding. Continued US technology-stock declines, together with widening credit spreads, increasing funding pressure and sustained ETF withdrawals, would provide stronger evidence of contagion. Stable financing and a return to ETF buying despite additional losses in China would weaken that interpretation.