According to ChainCatcher, according to CCData statistics, September has been one of the worst performing months for Bitcoin prices, with an average return of -4.51%, and only six Septembers in history have recorded positive returns. In contrast, April and November had the highest average returns, at 35.6% and 39.2%, respectively. Although September usually performs poorly, 2023 bucked the trend and achieved a weak return of 4.00%.

Despite the low return, Bitcoin's annualized volatility in September was relatively low, averaging 79.2%.