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BTC Bitcoin is expected to set a September record, but ETF funding flows complicate the situation.
According to CoinGlass data, as of September 29, Bitcoin rose by approximately 7.3%, slightly higher than the 7.29% in September 2024. This performance puts it on track to usher in the strongest September in history. However, the outcome is only a fraction of a millimeter: Bitcoin needs to stand above the close of about $83,600 on September 30 to lock in this historic achievement; and the situation of recording positive earnings for the fourth consecutive September will also depend on the final close. Currently, BTC/USD is trading at approximately US$83,300, slightly below the required key level.
If this consecutive rise is realized, it will be the longest September consecutive rise cycle in the data record. But this does not mean that the month's historical weakness has been completely denied. The core question is: Are September's seasonal patterns changing? Or have recent ETF demand and macro position allocation temporarily concealed existing market models?
Bitcoin's current yield is only slightly higher than 2024 levels, which provides limited basis for drawing strong conclusions. The launch of the spot Bitcoin ETF in 2024 provides a limited sample of data, making it difficult to determine whether its capital flow will affect seasonal trends. So, while recent demand and Bitcoin's rebound are crucial to analyzing this month's market, they do not confirm that the historical calendar effect has disappeared.
What does green September mean for Bitcoin's fourth quarter?
Bitcoin is about to make history! $BTC在七月和八月均收于涨势。如果九月也以红盘（注：此处原文green指上涨/盈利，中文语境通常用“收涨”或“飘红”表示上涨，但需结合上下文，英文green代表positive/gain）收盘，那将是比特币历史上首次连续三个月收涨。 历史正在被改写。CoinGlass数据显示，在2013年至2025年的13年中，有8年比特币九月收盘价下跌，平均九月收益率为-2.34%，这使得九月在历史上成为表现最弱的月份。从2017年到2022年，该指数连续六年出现九月跌幅，进一步强化了这一趋势。然而，随后的三年扭转了这一局面，2023年收益率为+3.91%，2024年为+7.29%，2025年为+5.16%。
如果2026年延续这一积极趋势，将挑战看跌叙事，但仅凭这些数据尚不足以宣称发生了决定性反转。即便九月创下潜在的历史性高收益，其幅度仍仅比2024年略好，这表明虽然值得注意，但并未为该月份建立可靠的看涨趋势。
ETF资金流与政策冲击推动了九月的逆转
在经历8月25%的涨幅后，比特币以近78,500美元的价格开启九月。然而，9月15日，参议院《清晰度法案》（Clarity Act）投票失败，给市场带来压力，导致现货比特币ETF出现4.504亿美元的资金流出。这一事件展示了政策变化如何迅速影响市场需求。
On September 16, the Federal Reserve raised interest rates by 25 basis points, raising the interest rate range to 3.75%-4%, pushing the price of Bitcoin back towards US$75,000. The combination of ETF outflows and rising interest rates suggests that seasonal patterns cannot be viewed in isolation and must be considered in the context of broader financial pressures.
Subsequently, the flow of funds reversed. Over seven trading days, the spot Bitcoin ETF attracted approximately US$2.98 billion in capital inflows, with a single-day inflow of nearly US$1 billion on September 21. CoinDesk confirmed net inflows for the day of $998.95 million, the highest single-day inflow since October 2025.
As Bitcoin soared to a high of $87,354 since January, short positions of more than $800 million were liquidated. Although there was a subsequent pullback of about 4%, fluctuations in ETF funds flows better explain the shift in market pressures.
The one-month rise does not resolve seasonal doubts
On the $BTC weekly chart, the next expansion phase has begun. I don't expect many people to wait for a major pullback in admission, let FOMO (Fear of Missing) begin.
The technical readings in the report remained constructive during the pullback: the Average Trend Index (ADX) was 42.3, the Relative Strength Index (RSI) was 61.2, and the 50-day moving average was above the 200-day moving average. The report emphasized that $82,626 is a key level, and if it breaks below, support will range from $81,166 to $79,705.
然而，比特币价格仍比2026年初始价格约87,497美元低约4.4%。历史数据显示，九月涨幅之后往往伴随下跌，而十月平均19.92%的回报率并不能保证2026年会重现类似表现。
即将到来的10月27-28日和12月8-9日的联邦公开市场委员会（FOMC）会议可能会影响风险偏好。虽然ETF资金流和宏观条件对比特币短期走势至关重要，但九月的逆转凸显了这些资金流的波动性。
如果在9月30日前收盘价能突破约83,600美元，这将标志着一个强劲的月份，但狭窄的差距表明，这更多是对现有模式的挑战，而非根本性的改变。
