Key Highlights

● Boeing (BA) opened at $192.62 on Monday, about 2.8% below Friday's close, and finished at $184.39 near its session low.

● The stock traded between $184.01 and $192.77, closing within 40 cents of its low as selling pressure held all day.

● The FAA will not certify the 737 MAX 10 until it assesses a software issue that GE Aerospace supplied.

● Industrials were among the four S&P 500 sectors that fell the most, while 2,054 NYSE stocks declined against 678 advancers.

Boeing (NYSE:BA) closed at $184.39 on Monday, September 28, down from $198.07 on Friday, after the Federal Aviation Administration said it would review a newly flagged software issue before certifying the 737 MAX 10. The stock gapped lower at the open at $192.62 and slid to a session low of $184.01, finishing near the bottom of its range. The Dow Jones Industrial Average fell 347.11 points to 51,481.51. The Dow is a price-weighted index of 30 Blue-Chip US companies. Boeing's high share price gives it significant weight, so a sharp drop in its stock can drag on the entire index.

How the Selling Built Through the Day

The decline did not reverse. Boeing opened roughly 2.8% below Friday's close, traded between $184.01 and $192.77 and closed within 40 cents of the session low. Such an early and persistent slide points to investors reacting to the FAA headline and then finding few buyers as they weighed what the review could mean for delivery timelines.

Inside the FAA Review

The FAA said it will not certify the 737 MAX 10 until it assesses a software issue in which automated flight guidance can be unavailable in some landing and go-around scenarios. The regulator said the software "can increase pilot workload when doing a go-around." GE Aerospace (NYSE:GE) supplied the software, according to reports.

FAA Administrator Bryan Bedford said: "We will be delaying the 10 until we're satisfied that we don't have an issue here." A Boeing spokesperson responded: "We continue to follow the lead of the FAA as we work through the certification process."

Why the Delay Matters

The MAX 10 is the largest member of Boeing's 737 MAX family, and airlines are waiting for it. Each certification delay pushes back deliveries and the cash that comes with them, which is why a regulatory headline can move the stock so sharply.

GE Aerospace also fell, and reports noted its role as the software supplier. Industrials were among the four S&P 500 sectors that fell the most.

A Heavy Backdrop

The broader market added to the pressure. Long-term yields surged, with the 10-year at its highest level since 2007 and the 30-year at its highest since 2004. Oil climbed after President Trump rejected Iran's Hormuz proposal, raising jet-fuel costs for airlines, Boeing's customers. On the NYSE, 2,054 stocks declined against 678 advancers.

Boeing Waits on a Fix and a Timeline

The next catalyst is any update from the FAA or Boeing on the software fix and a revised certification timeline. Investors will also look for reactions from airlines with MAX 10 orders and from GE Aerospace.

The week's macro calendar includes JOLTS and consumer confidence on Tuesday, PCE Inflation Wednesday, ISM Manufacturing Thursday and the September jobs report Friday. How Boeing trades around Monday's session low may depend on how quickly regulatory clarity arrives.