August turned out to be Bitcoin's best month in recent years, allowing it to recover three months of losses in just two weeks. However, September lies ahead, which historically is one of the most treacherous periods for the market. In focus are the Federal Reserve meeting and the release of key macroeconomic data that could dramatically shift the balance of power.

Following Fed Chair Jerome Powell's speech at the Jackson Hole symposium, the probability of a rate hike at the September meeting surged sharply—from 45% to 60%. This is a signal the market could not ignore. The regulator's rhetoric proved far more "hawkish" than expected, and investors are now forced to reassess their positions.

Why September Frightens the Market

For the first time in 11 years, Bitcoin broke the tradition of closing August in the red after U.S. midterm elections. The asset rose roughly 28% and surpassed the $80,000 mark. But September is the "September effect": the close of the third quarter, funds preparing for tax payments, and portfolio rebalancing create a powerful backdrop for a correction.

Powell made it clear that a rate cut is unlikely in the near term. The labor market remains resilient (unemployment around 4.1%), corporate capital expenditures are growing 9% year-over-year, and inflation, per the preferred PCE index, holds at 3.7%—nearly double the 2% target. The regulator is clearly not confident in sustained inflation movement toward the goal, and this lays the groundwork for further tightening.

Decision Calendar: What to Watch

I highlight several key dates that will shape market sentiment in the coming weeks:

  • 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 impact carry trades;
  • September 25 — Expiry of the quarterly Bitcoin options block with open interest around $12 billion;
  • September 30 — Release of the PCE index, shaping expectations ahead of the October meeting.

Levels to Watch

The base scenario is consolidation in the range of $74,000–75,000 (lower bound) and $80,000–84,000 (upper bound). A move to $100,000 in September is unlikely, but I also do not expect a sharp crash. However, ahead of the CPI release on September 11, some investors will begin taking profits, which could lead to a pullback to $75,000, $74,000, and even $72,000.

If CPI comes in weaker than forecasts and ETFs do not show major outflows, Bitcoin could quickly return to the $80,000–84,000 range. Otherwise, the probability of a rate hike will rise to 70–80%, and the $74,000–75,000 level will become key support, the loss of which would open the path to $70,000–72,000.

Special attention should be paid to the options expiry on September 25. Judging by the open interest structure, many traders are pricing in a drop to $70,000, which sets the stage for heightened volatility and false breakouts in the second half of the month. I consider this date key for determining Bitcoin's further fate in September.

My view: despite historical seasonality (BTC's average return in September is around −3%), the last three years have seen the month close in positive territory. However, the current macroeconomic uncertainty and the Fed's "hawkish" stance make this September particularly risky. I recommend investors be prepared for high volatility and avoid excessive leverage ahead of key reports.