Imani Moise

Why do the accuracy of these estimates matter to investors?

That makes a lot of sense.

Is there something similar going on with other data releases like inflation, for example?

That was WSJ economics reporter Matt Grossman.

Thanks, Matt.

Coming up, a big market rally after the ceasefire news, why flights are getting more expensive, and Meta's answer to AI rivals.

That's after the break.

Major U.S.

stock indexes rallied today.

The Dow shot up by more than 1,000 points at the open and stayed high, ending up 2.8%.

Similarly, the Nasdaq and S&P 500 each rose more than 2.5%.

Meanwhile, U.S.

oil prices tumbled 16% to about $94 a barrel.

Agreements to reopen the state of Bermuda would make a long-term energy shortage less likely.

Fuel-intensive companies like airlines and cruises were some of the biggest gainers of the day.

But the truce might be more fragile than market reactions imply.

WSJ markets reporter Hannah Aaron Lang polled her sources on what they're paying attention to now.

So, Hannah, are markets still on edge, as you said yesterday, or is this the start of a long-term rebound?

Some people are calling what happened today the taco trade.

Can you tell us what that means?