CNBC Daily Open: AI spending fears haunt markets before Halloween

Style-photography | Istock | Getty ImagesGood morning. This is Hui Jie writing to you from Singapore. Markets open and close every day. Today, Daily Open will close for the final time.Thank you for making us part of your morning routine. From interest rates and market swings to the rise of AI, we hope we've helped make sense of the biggest business stories and given you something enjoyable to read along the way.From Monday you will be receiving Morning Squawk, which is your daily look at the news shaping markets and business. If you would like to unsubscribe, you can click here.It's been a pleasure writing for you, truly, and thank you for reading.— Lim Hui Jie, Leonie Kidd, Anniek Bao and Justina LeeHalloween is still about a week away, but markets are already getting some of the heebiee-jeebees. Investors saw a sell-off in U.S. markets as renewed concerns around spending by artificial intelligence companies came to the fore, while oil prices jumped amid rising geopolitical tensions. The tech-heavy Nasdaq tumbled over 2%, marking its worst day since June, while the S&P 500 recorded it's largest decline since July and dipped 1.2%. One major tech name leading the losses was Meta...