- •80-90% of S&P 500 stocks will enter blackout in 1-2 weeks
- •Stock buybacks slow during blackout, reducing market support
- •Crypto could see a temporary dip followed by a strong rebound
What Is the S&P 500 Blackout Period?
In the next one to two weeks, around 80% to 90% of S&P 500 companies will enter what’s known as the “buyback blackout period.” This is a regular event that happens each quarter, typically ahead of earnings season. During this time, companies pause or reduce their stock buyback programs to avoid potential insider trading concerns.
Stock buybacks are a major force behind market stability and upward momentum. When companies reduce or stop these buybacks, the market can temporarily lose one of its strongest sources of support. Historically, this has led to short-term dips in stock prices.
Why This Matters for Crypto Investors
Although this blackout directly affects traditional equities, it often spills over into the crypto market. Many institutional investors are active in both sectors. When equity markets become uncertain or pull back, these investors may reduce their exposure to riskier assets like cryptocurrencies.
As a result, a temporary dip in major cryptocurrencies such as Bitcoin and Ethereum could occur over the next couple of weeks, mirroring weakness in the stock market. However, this dip is expected to be short-lived.
80%-90% of S&P 500 stocks will enter the blackout period in the next 1-2 weeks.
— Ted (@TedPillows) September 30, 2025
During this timeline, they will temporarily slow down the buyback program, which has been a strong driver for stocks.
This could result in a temporary dip, which will impact crypto too.
After that,… pic.twitter.com/OexbIVQ4Aq
What Happens After the Blackout?
Once the earnings season begins and the blackout period ends, companies typically resume their buyback programs. This renewed activity can help lift stock prices, and by extension, improve investor sentiment across markets — including crypto.
If history is any guide, this could pave the way for a broader rally. Traders and investors should watch for signs of stabilization and prepare for potential opportunities during and after this transitional phase.