Wall Street's go-to recession indicator is starting to get attention

London(CNN Business) Past may not be prologue for financial markets as the global economy continues to reel from the pandemic. But a traditional recession signal is still catching Wall Street's attention.

What's happening: The US government bond market sold off on Thursday alongside stocks following the news that inflation reached 7.5% in January — its highest level in four decades. The yield on the benchmark 10-year US Treasury, which moves opposite prices, shot above 2% for the first time since 2019. It was close to 1.5% at the end of last year.

Investors were particularly worried, however, about the yield on shorter-term US bonds like the two-year note, which has been rising even more dramatically. It's now above 1.5%, gaining about 110% so far in 2022.

Why this matters: Typically, investors demand higher payouts for longer-dated bonds, since it's harder to predict risk and economic conditions over extended periods.

But if yields on shorter-dated bonds jump above the 10-year — producing an "inverted yield curve" — that's a sign that investors expect a deterioration in near-term economic conditions and aggressive intervention from the Federal Reserve.

In 2018, the Federal Reserve Bank of San Francisco published research that found a yield curve inversion preceded every recession since 1955, producing a "false positive" just one time. (It looked specifically at the yield on one-year Treasuries.)

Investors indicated on Friday that they're watching to see if this happens again. Jim Reid, a strategist at Deutsche Bank, called the run-up in the yield on the two-year Treasury an "ominous sign."

The worry is that because the Fed is now playing catch-up on inflation, it may make a mistake and pull back support for the economy too quickly, causing a recession.

Goldman Sachs said Thursday that it now expects the Fed to hike interest rates at every meeting left this year. And Federal Reserve Bank of St. Louis President James Bullard told Bloomberg that he now supports a rapid increase of rates by July.

Bullard implied he'd back one supersize hike of 0.5 percentage points before then. The central bank hasn't executed a half-point hike since 2000.

But Michael Hewson, chief market analyst at CMC Markets, told me a yield curve inversion is "not necessarily a reliable indicator." He noted that the curve inverted in 2019 and that didn't seem to predict anything. There was a recession in 2020, but that was triggered by Covid-19.

Despite higher inflation, the International Monetary Fund expects the US economy to grow by 4% this year, down from 5.6% in 2021.

Hewson said that the curve may be a "warning to the Fed that maybe if they tighten too quickly they could cause more damage than they intend."

Yet he sees "stagflation" — rampant inflation and weak economic growth — as a larger risk than a recession.

"That's the bigger concern right now — that inflation starts to outweigh GDP," Hewson said.

Zillow tries to put its rough year behind it

Zillow's announcement that it was exiting the home flipping business dealt a massive blow to the company. Now, it's trying to prove it can move on.

The latest: Shares of Zillow (Z) are up 13% in premarket trading on Friday after it reported $3.9 billion in revenue for its most recent quarter, beating Wall Street's expectations.

"Zillow has a rock-solid financial foundation," CEO Rich Barton said in a statement, adding that about one quarter of US homebuyers used Zillow as they shopped last year.

Remember: Zillow's shares collapsed after it said that it would shut down its Zillow Offers unit, which used algorithms to buy up thousands of homes that it would then renovate and try to quickly resell, a process known as "iBuying."

But the company later disclosed this approach wasn't working, pointing to "the unpredictability in forecasting home prices."

The failure of the business led to a $528 million loss last year, Zillow said Thursday.

Yet the company is making good progress selling the homes still in its portfolio, offloading about 8,350 last quarter.

"We've made significant progress in our efforts to wind down our iBuying business — selling homes faster than we anticipated at better unit economics than we projected," Zillow told shareholders. "We feel even more confident today that exiting iBuying and eliminating the housing market balance sheet risk to our company and our shareholders was the right decision."

Never tweet? Accidental post scrambles Affirm shares

Buy now, pay later has been booming. But that's not why people are talking about Affirm, one of the industry's top players.

The company's shares rallied as much as 12% on Thursday. The company, which went public early last year, accidentally shared some results from its latest quarter early on Twitter.

It later deleted the post and said it was shared "due to human error." Oops.

Wall Street was less happy with the full picture, which showed ballooning losses for the last three months of 2021. Affirm said this was due to stock-based compensation tied to its initial public offering.

Investor insight: Both tweets and earnings have consequences. Shares ended the day 21% lower, and they're down another 10% in premarket trading Friday.

While the company's stock is still trading above its initial public offering price of $49, it's going through a rough patch — shedding more than 60% after peaking above $176 in November last year.

Up next

Goodyear Tire (GT), Newell Brands (NWL) and Under Armour (UA) report results before US markets open.

Also today: The latest University of Michigan survey of consumer sentiment arrives at 10 a.m. ET.

Coming next week: Earnings season continues with Marriott (MAR), Airbnb, Hilton (HLT), Kraft Heinz (KHC), DoorDash, Nvidia (NVDA) and Walmart (WMT).