August turned out to be a surprisingly strong month for Bitcoin: the asset managed to recover three months of losses in just two weeks. However, September lies ahead, which is traditionally considered one of the most treacherous periods for risky assets. And, judging by the current macroeconomic picture, it is this month that will determine whether BTC can hold its gains or whether we face a deep correction.

The key trigger of uncertainty was the speech by Federal Reserve Chairman Kevin Warsh at the Jackson Hole symposium. His rhetoric was instantly reflected in the market: the probability of a rate hike at the September meeting jumped from 45% to 60% in just one hour. This is a serious signal that cannot be ignored.

Why September scares the market

For the first time in 11 years, Bitcoin broke the tradition of closing August in the red after the U.S. midterm elections. From August 17 to 28, the asset rose by about 28%, surpassing the $80,000 mark. However, September historically remains the second worst month for BTC and one of the weakest for the entire U.S. stock market. Analysts attribute this to the "September effect": the close of the third quarter, funds preparing for tax payments, and portfolio rebalancing create downward pressure.

Warsh's speech only heightened concerns. He made it clear that a rate cut in the near future is unlikely. Key points:

  • The labor market remains resilient: unemployment is around 4.1%, jobless claims are low, and consumer spending is rising;
  • Corporate capital expenditures are increasing by about 9% per year, largely driven by AI development;
  • The Fed's preferred PCE index shows inflation of about 3.7% against a 2% target, with half of goods and services rising faster than 3% per year;
  • The regulator is not yet confident in a sustained move of inflation toward the 2% target.

It is this rhetoric that raised the probability of a rate hike. A higher rate increases the attractiveness of U.S. Treasuries, strengthens the dollar, and forces investors to demand a larger risk premium from stocks and cryptocurrencies. Bitcoin, as one of the assets most sensitive to global dollar liquidity, will come under pressure.

Key September dates

Here is the calendar of events that will determine market movement:

  • September 1 and 4 — U.S. labor market reports;
  • September 10 — Producer Price Index (PPI);
  • September 11 — Consumer Price Index (CPI) for August, the main report of the first half of the month;
  • September 16 — Fed meeting with updated economic forecasts;
  • September 18 — Bank of Japan meeting, which could affect carry trades;
  • September 25 — Expiry of the quarterly block of Bitcoin options with open interest of about $12 billion;
  • September 30 — Release of the PCE index, shaping expectations ahead of the October meeting.

Which Bitcoin levels to watch

The base scenario is consolidation in the range between $74,000–75,000 (lower bound) and $80,000–84,000 (upper). A move to $100,000 in September is unlikely, but I do not expect a sharp crash either.

Based on August dynamics, when net inflows into spot ETFs of about $3 billion over ten trading days helped Bitcoin rise from $64,000 to $80,000, one can estimate how much capital will be needed to move to different levels:

  • $400–800 million in inflows over several sessions could send BTC to the $74,000–75,000 zone;
  • $800 million–$1.2 billion is needed to recover from $75,000 to $80,000;
  • $1.5–2.5 billion will be required to move toward $84,000–85,000.

Before the CPI release on September 11, some investors will be reducing risk and taking profits after a strong August. Bitcoin could pull back to $75,000, $74,000, and even $72,000. The further scenario depends on inflation data:

  • If CPI comes in weaker than expected and ETFs do not show large outflows, the probability of a rate hike will decrease, and BTC could quickly return to the $80,000–84,000 range;
  • If inflation again proves high, the probability of a rate hike could rise to 70–80%, the $74,000–75,000 level will become key support, and losing it would intensify the correction toward $70,000–72,000.

The Fed meeting on September 16 may not in itself trigger a sharp reaction if the market has already priced in a rate hike in advance. Stronger movement should be expected against the backdrop of inflation data releases.

I pay special attention to the options expiry on September 25: judging by the open interest structure, many traders are pricing in a Bitcoin drop to $70,000, which creates conditions for heightened volatility and false breakouts in the second half of the month. I consider this date key for BTC.

The historical average return of Bitcoin in September is about −3%, but the last three years have seen the month close in positive territory, so building a forecast solely on seasonality is not advisable. My final outlook for the month is movement in a wide range with a downward bias in the first half of September and an attempt to return to $80,000–84,000 in the second, if inflation data does not worsen the picture.

My view: the market is in a phase of high uncertainty, and September will be a test of strength for the bullish scenario. Investors should be prepared for heightened volatility and avoid opening large positions until key macroeconomic data is released.