This blue chip stock fell to a 4yr low and dragged the stock market down

That's a great starting point! Can you please provide more information about the blue chip stock that fell to a 4-year low and dragged the stock market down? Here are some questions to help me narrow down the search:

1. What is the name of the blue chip stock?
2. Which sector or industry does it belong to (e.g. technology, finance, healthcare, etc.)?
3. What was the specific date or time frame when the stock fell to a 4-year low?
4. How much did the stock price drop during that period?
5. Was there any specific news or event that contributed to the stock's decline?
6. Which stock market indices (e.g. S&P 500, Dow Jones, Nasdaq) was the stock part of, and how did it affect the overall market?

With more information, I can try to help you identify the specific blue chip stock that fell to a 4-year low and dragged the stock market down.