台北股市在 4 個交易日內迎來外資高達 2,272 億元的密集提款，指數盤中重挫並接連失守短天期均線，終場下挫 351 點收在 45,511 點。這場拋售潮的本質並非台灣科技產業基本面惡化，而是美債殖利率跨越關鍵心理關卡後引發的全球槓桿去化。當外部資金成本重估，被動型基金被迫啟動流動性抽回機制，導致現貨市場承受罕見賣壓。此時適逢期貨月結算與聯準會決策窗口，多空博弈張力推升至極致。這場由外圍利率引導的防禦性撤退，正把台股的短線定價權強行推向季線支撐位，成為檢驗多頭防線厚度的關鍵分水嶺。Taiwanese equities weathered an intense NT$227.2 billion withdrawal by foreign institutional investors over four trading sessions, sending the benchmark index tumbling through short-term moving averages to finish down 351 points at 45,511. The underlying catalyst was not deteriorating fundamentals within Taiwan's technology complex, but a global deleveraging wave triggered by U.S. Treasury yields crossing key psychological thresholds. As the external cost of capital was reassessed, passive funds were forced into liquidity-redemption mechanisms, unleashing rare selling pressure on the cash market. Coinciding with monthly futures settlement and a Federal Reserve policy window, long-short tensions rose to an extreme. This interest-rate-driven defensive retreat is forcibly driving short-term price discovery toward the quarterly moving average, setting up a decisive test of the bull market's defensive depth.

現貨量縮與巨額凍資加劇流動性失血Contracting Cash Volume and Frozen Capital Deepen Liquidity Drain

大盤連跌 4 天拉出四根黑K棒，成交量萎縮至 6,034 億元的近 2 個月低點，清晰勾勒出買盤退縮的流動性困局。外資單日拋售 626.99 億元，將 4 天累計淨賣超推升至 2,272.67 億元，直接抽乾了權值股的承接量能。雪上加霜的是，興櫃市場單一IPO申購案鎖定市場超過 8,600 億元資金，形成嚴重的排擠效應。多重資金抽離匯聚在同一個時間窗口，使集中市場失去了常態下的緩衝墊。在追價資金全面熄火的狀態下，指數缺乏有效抗跌力道，賣盤僅需有限的拋壓便能擊破層層防線，令盤面呈現量縮下挫的防禦態勢。The benchmark index notched four consecutive daily declines, carving out four straight bearish candlesticks as trading volume dwindled to NT$603.4 billion—a near-two-month low that laid bare a liquidity impasse marked by retreating bids. Foreign investors dumped a net NT$62.699 billion in a single session, lifting their four-day cumulative net selling to NT$227.267 billion and draining absorption capacity from heavyweight index components. Compounding the pressure, a single emerging-stock IPO subscription locked up over NT$860 billion across the market, triggering a severe crowding-out effect. Multiple liquidity drains converged in the same window, depriving the centralized exchange of its ordinary buffer. With buyers entirely sidelining themselves, the index lacked meaningful support, allowing modest selling volume to breach successive technical floors and leaving the market in a low-volume, defensive descent.

淨空單破 8 萬口壓制指數反彈動能Net Short Positions Above 80,000 Contracts Cap Technical Rebound

衍生性金融商品市場的籌碼結構，揭露了國際資金更深層的防衛心態。外資在台指期留倉的未平倉淨空單飆升至 83,223 口的高檔，創下近期罕見的極端水位。即便投信在期貨端握有超過 7.2 萬口淨多單進行跨市場避險，三大法人合計仍處於淨空單狀態。外資並未在結算日前夕順勢獲利平倉，反映出大型機構投資人面對即將公布的利率決議，寧願持續支付昂貴的轉倉溢價與避險成本，也不願提早釋出保護部位。這種極端防守布局直接轉化為指數上檔的重壓，徹底鎖死了短線多頭組織技術性反彈的運作空間。Positioning in derivatives markets revealed an even deeper layer of institutional defense. Foreign investors lifted their open net short positions in Taiwan Index Futures to an elevated 83,223 contracts, reaching a rare extreme in recent memory. Even as domestic investment trust firms maintained over 72,000 net long contracts for cross-market hedging, the three major institutional groups remained in a collective net short posture. Rather than booking profits ahead of settlement day, large foreign accounts showed a willingness to pay steep rollover premiums and hedging costs ahead of imminent central bank rate decisions instead of releasing protection prematurely. This extreme defensive posture acted as a heavy lid on index upside, fully shutting down the tactical window for bulls to mount a technical rebound.

法人加速退場由散戶與官股被動承接Institutional Retreat Shifts Burden to Retail and State-Backed Buyers

在法人撤資的背後，籌碼結構呈現土洋對作與公私分歧的拉鋸格局。三大法人單日合計自現貨市場撤出 788.96 億元，八大公股行庫則進場買超 121.1 億元試圖穩定軍心。融資餘額僅微幅減少 16.37 億元並維持在 5,822.4 億元的高水位，顯示散戶籌碼並未因連日急跌而出現恐慌性多殺多，反而展現逆勢承接的強烈意願。然而，散戶與公股的資金屬性偏向被動防守，缺乏引領行情反轉的主動定價權。當法人籌碼加速流向零散資金端，市場持股信心將面臨拉長週期的波動考驗，籌碼沉澱需要更具說服力的外在催化劑。Behind the institutional exit, ownership structures showed a tug-of-war between domestic and foreign capital, as well as state and private actors. The three institutional groups pulled a combined NT$78.896 billion from the cash market in a single session, while eight state-run banks stepped in with net purchases of NT$12.11 billion to steady sentiment. Margin debt contracted by a modest NT$1.637 billion, holding at an elevated NT$582.24 billion, indicating that retail accounts did not succumb to margin-call panic amid the sharp drawdown and instead displayed strong counter-trend appetite. However, retail and state capital act primarily as passive shock absorbers without active price-discovery power. As institutional shares shift into fragmented hands, market confidence will face extended volatility, and stabilizing technical supply will require a more compelling external catalyst.

本刊判斷，當前跌勢為外部利率重估引發的流動性去槓桿，非基本面轉向。接下來的關鍵在於結算後避險頭寸的重組節奏：外資期貨空單能否順利降溫退場，以及現貨成交動能是否如期回溫。若期貨避險部位顯著縮減且現貨補量，盤勢將完成測底並迎來均線修復；若外資選擇跨月展期避險，大盤將在季線關卡拉長震盪週期。AHI Journal views the current downturn as liquidity-driven deleveraging prompted by shifting interest-rate expectations, rather than a fundamental reversal. The immediate focus rests on the post-settlement repositioning of hedge books: whether foreign index futures shorts unwind cleanly, and whether cash-market turnover stages a timely rebound. A meaningful contraction in short hedges alongside rising cash volume would signal a successful bottoming process and technical repair; should foreign accounts roll protective shorts into the next contract month, equities will face a protracted consolidation around the quarterly moving average.