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Hello and happy Mother’s Day! Whether you’re celebrating, being celebrated or just having a normal Sunday, make mom proud and stay on top of the news. Here’s a quick catch-up on what happened in the tech and business worlds this week, and what to look for in the days ahead.

May 5-11

What’s Up?

Fasten Your Seatbelts

Finally, you can invest in Uber — if you want to, that is. On Friday, the ride-hailing company that has reshaped urban transportation pulled off the year’s most anticipated initial public offering, one of the biggest in United States history. But what was supposed to be a hot stock turned lukewarm when Uber priced its shares near the bottom of the expected range. Why so conservative? The company wanted to avoid the mistakes of its smaller rival Lyft, whose value has fizzled by nearly 30 percent since its splashy market debut at the end of March. And so far, Uber did fare better, but its first day of trading didn’t “pop” like many investors had hoped. In fact, it ended the day down more than 7 percent. Also not celebrating this weekend: drivers for both Uber and Lyft, who held protests this past week to demand better wages.

Things That Go Bump in the Night

After months of back-patting over “progress” in the trade talks between the United States and China, President Trump abruptly raised tariffs on $200 billion of Chinese imports to 25 percent from 10 percent, effective 12:01 a.m. on Friday. How did we get here? Mr. Trump accused China (via Twitter, naturally) of trying to revisit crucial points of the agreement as it was nearing completion, although China disputes this. Beijing’s initial response was muted, although it vowed to retaliate with its own tariffs and possible boycotts of American products. The talks ended on Friday without any deal. Any escalation in the trade war is a lose-lose for consumers as well as farmers and manufacturers around the globe.