• US stocks usually dip in September, but strong ETF flows and likely rate cuts could keep markets from following the trend.
• Crypto ETFs, especially Bitcoin products, are reshaping price dynamics and fueling institutional inflows into the broader market.
• Issuers like BlackRock explore Web3 ETFs, but weak retail interest in new products like Dogecoin ETFs signals mixed momentum.

Traditionally, the “September Curse” is an important consideration in US investments, but crypto ETFs may be able to beat it. The SPX is up 2.3% this month, so it would need to fall fast to match the trend.

ETF markets are an important factor in US stock growth, and Web3 is playing a starring role. Bitcoin ETFs permanently altered BTC’s price dynamics, so hopefully, another success is possible.

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Crypto ETFs Defying Trends

Although economists aren’t exactly sure what causes the “September Curse,” it’s a well-documented effect: US stocks dip in September. This curse primed the 1929 crash, and has exhibited temporary declines on a regular basis since.

However, the September Curse might not strike this year, and crypto ETFs could play a key role:

Eric Balchunas, a Bloomberg ETF analyst, noted that the stock market would break this trend unless a huge dip happens in the next two weeks.

A few factors, like the near certainty of an interest rate cut, are contributing to this situation, but ETFs are also playing a key role. Crypto ETFs in particular are enjoying a real moment.

Bullish Factors to Consider

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Crypto is having a massive impact on the ETF market, as surging institutional inflows are reinventing price dynamics. The first Bitcoin ETFs may have permanently changed BTC’s usual cycles, after all.

If corporate capital keeps flying in like this, why shouldn’t it impact the entire stock market? Crypto ETFs are massively influential in September 2025 alone; issuers have been filing for new products at an intense rate.

Issuers like BlackRock are even considering incorporating Web3 characteristics into some of their traditional ETF products. Bitcoin products are currently some of the largest ETFs in the market. That isn’t to say that crypto is carrying the whole trend on its back, but it’s certainly one factor.

How Could the Curse Manifest?

Still, a lot of things could change in the near future, and September is only halfway over. Rate cuts might not impact crypto much, or could even present a bearish signal to broader markets. In this fragile and unprecedented regulatory climate, several worrying concerns could lead to another drop.

Plus, this asset sector has a few worrying signals of its own. Dogecoin is about to have the first meme coin ETF, but traders have remained apathetic. That could be a bad sign for retail buy-in and new products’ growth potential.

Crypto ETFs may be able to defy the September Curse, but it’s too early to start celebrating. For now, investors and observers should carry on business as usual and hope that markets stay the course.

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