CNBC Daily Open: The Santa Rally didn’t show up, but that's not necessarily bad news

This report is from today's CNBC Daily Open, our international markets newsletter. CNBC Daily Open brings investors up to speed on everything they need to know, no matter where they are. Like what you see? You can subscribe  here .

Rocky week of trading
U.S. stocks rose on Friday but still ended the week lower. The S&P 500 Energy sector bucked the trend, and is up more than 3% for the week. Asia-Pacific markets traded mixed on Monday. South Korea's Kospi jumped almost 2% amid continued political uncertainty. China's CSI 300 fell around 0.6% even as the Caixin services purchasing managers' index in December expanded at its fastest pace in seven months.

Boeing's year of rebuilding
Boeing has not posted an annual profit since 2018, which saw the first of two fatal crashes of its 737 Maxes that killed 346 people. A year ago, an unused emergency exit door blew out midair from a nearly new Boeing 737 Max 9 operated by Alaska Airlines. New CEO Kelly Ortberg, who began in the top job in August, is tasked with ensuring Boeing can ramp up production and maintain quality. Here's how he's getting on.

Microsoft invests big in data centers
Microsoft plans to spend $80 billion in fiscal 2025 on the construction of data centers that can handle artificial intelligence workloads, the company said in a Friday blog post. Over half of the expected AI infrastructure spending will take place in the U.S., Microsoft Vice Chair and President Brad Smith wrote. Microsoft's 2025 fiscal year ends in June.

Mopping up the vacuum cleaner competition?
Shares of Chinese robot vacuum cleaner company Roborock jumped more than 3% on Monday after it revealed a new model that comes with a folding arm for removing socks and other obstacles. Its appendage is powered