• New bank worries weigh on the market.
• TikTok's CEO faces heat from Congress.
• Walmart lays off hundreds at e-commerce centers.

Here are the most important news items that investors need to start their trading day:

1. Shaky ground

It's been a volatile few days, but the major U.S. stock indices were up for the week heading into Friday's session. That could change thanks to new upheaval in the global banking system. Shares of Deutsche Bank, which experienced a sharp rise in credit default swaps, weighed on European markets. U.S. futures showed the same strain Friday morning. Elsewhere, Treasury Secretary Janet Yellen played a little cleanup Thursday after she said the government wasn't considering a universal backstop of all U.S. deposits the day before. "The strong actions we have taken ensure that Americans' deposits are safe. Certainly, we would be prepared to take additional actions if warranted," she told lawmakers Thursday. Follow live markets updates.

2. A time to borrow

Another thing investors are keeping an eye on: How banks are using a new lending program the Federal Reserve unveiled earlier this month to quell concerns about the sector after Silicon Valley Bank's collapse. This week, financial institutions borrowed $53.7 billion from the Bank Term Funding Program, a big jump from $11.9 billion last week. The program allows banks to secure one-year loans backed by Treasuries and other assets at full price even if their market values are lower. As CNBC's Hugh Son points out, U.S. banks are sitting on loads of unrealized losses from bonds as rising interest rates weigh on their value.

3. TikTok CEO feels the heat

Shou Zi Chew, the CEO of uber popular social media platform TikTok, faced one angry lawmaker after another during a fiery, five-hour House hearing Thursday. The rancor was bipartisan, too, since anti-TikTok fervor is the most attention-grabbing way to criticize China in Washington. Officials in Congress and the Biden administration believe TikTok is a national security threat, given that it's owned by China-based ByteDance. "TikTok needs to be an American company with American values and end its ties to the Chinese Communist Party," Rep. Darren Soto, R-Fla., said during the hearing. Proponents of the app say other social media platforms carry their own risks, but they aren't being subjected to the same treatment. TikTok pushed back against the congressional onslaught: "Not mentioned today by members of the Committee: the livelihoods of the 5 million businesses on TikTok or the First Amendment implications of banning a platform loved by 150 million Americans."

4. Walmart recalibrates

Even Walmart – the nation's largest retailer, grocer and employer – isn't immune from shifts in the economy. The big box behemoth has been laying off hundreds of employees at e-commerce fulfillment centers across the country. "This decision was not made lightly, and we're working closely with affected associates to help them understand what career options may be available at other Walmart locations," the company said. While that's not a lot of Walmart employees, relatively speaking, it speaks to a bigger overall shift in how shoppers are spending their money. Indeed, as Americans who are squeezed by inflation spend more on essentials like groceries, they spend less on online impulse buys and discretionary items. Walmart benefits from that dynamic, given their scale and their low prices, which puts extra strain on its competition.

5. Russian strikes kill civilians

More Ukrainian civilians died overnight in a new wave of Russia airstrikes, as the war grinds on with no end in sight. "Three resettled women from other settlements of the region died under the rubble, and two more people were injured," Ukraine's state broadcaster said. Elsewhere, Ukrainian forces have signaled that they are mustering a major counteroffensive. This comes as Russian forces seemingly stall in out in their attempts to take parts of eastern Ukraine. Follow live war updates.

– CNBC's Alex Harring, Christina Wilkie, Hugh Son, Lauren Feiner, Melissa Repko and Natasha Turak contributed to this report.

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