Boeing
Boeing 737, courtesy of Boeing Media Center. 

Investors sitting on the sidelines of the current stock market rally likely find themselves cautious to put more money into the market – fearing that it's due for a pullback. Regardless of whether a pullback happens sooner rather than later, as a long-term investor, you would be better to put your investment money in companies with sustainable and profitable growth. Here are a couple recent events that emphasize two reasons Boeing (NYSE:BA) offers that type of growth potential.

Future growth looks promising
Over half of Boeing's revenue comes from its commercial aviation industry which continues to be a long-term-growth story. Boeing estimates that over the next 20 years the demand will hit 34,000 commercial airplanes – an increase estimated to be worth $4.5 trillion. This growth will be led by emerging markets' growing demand, as well as mature markets' replacing existing aircraft fleets. 

The upside of this emerging market growth is apparent in Boeing's recent press release. Boeing just finalized an order for seventy 737 commercial airplanes. The order was mixed between MAX 8s, MAX 9s, and Boeing's next-generation 737-800. The deal is valued at nearly $7 billion and is the largest Boeing order in Turkish Airlines' history. As emerging markets continue to develop, investors hope this will be a reoccurring press release. 

"We are delighted to finalize the order, which will considerably expand our fleet and contribute to our continued growth," said Temel Kotil, CEO of Turkish Airlines, in a Boeing press release. "Turkish Airlines is a global airline, serving the most countries worldwide and we are building the strongest network in the world. Our long-standing partnership with Boeing is one of the key factors behind the success of Turkish Airlines."

The latter part of Kotil's quote is most important to me. It's important for Boeing to keep long and healthy relationships with emerging markets as the world's fleet continues to grow – providing a sustainable customer base.

Juicing margins
Boeing also recently announced its 787 program was on track to achieve its goal of producing 10 per month by the end of this year – up significantly from the two planes per month in 2011. So far 50 of the 787s have been delivered, but that is significantly less than the 800 in remaining global orders.

Boeing executives are aiming to increase margins with increased production rates across multiple models. Each extra airplane produced per month will minimize overhead costs and become more profitable. Management also expects its 777 model to increase by one plane per month and its 737 to increase by four per month by mid-2014.

Bottom line
The most important thing when investing in a market that has reached record highs, is finding stocks that still have future sustainable and profitable growth. Boeing expects its orders to continue as demand for commercial aircraft increases. In addition, its consistent effort to produce more planes per month will have a substantial effect on Boeing's bottom-line profit. In the midst of government defense spending cuts, those two reasons could make Boeing stock a buy today – even as the market flirts with record-high levels. 

Motley Fool contributor Daniel Miller has no position in any stocks mentioned. The Motley Fool has no position in any of the stocks mentioned. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.