'tightening competition' is correct and usable in written English.
You can use it when referring to a situation where there is increased competition, such as when two companies are competing for the same market share. For example, "With Amazon and Walmart both vying for the top spot, the market is experiencing tightening competition."
If completed, the deal would be a sign both of Beats' market power and of the tightening competition among digital music companies.
In a sign of the tightening competition some 90 days before the New Hampshire primary, Mr. Romney's comments brought a quick response from Mr. Giuliani's campaign.
That development stuck a nerve with investors who are already worried about tightening competition.
When reminded of the tightening competition and the volatile market, his face lights up: "That's the challenge".
The third quarter will reflect the tightened competition for AMD and Intel as heavy shipments of dual-core processors will be released.
Since then, its team has been tasked with scaling the business across the region, and now it has been decided that it is time to push on by introducing new services to tighten competition and grow its user base.
Today's race also tightened the competition between the top three drivers.
Spotify today took another small step to tighten up competition in the European market today: it signed a deal with Orange to offer unlimited music services as part of "Orange Young," a special subscription that Orange has devised specifically for the under-27 market in Switzerland.
"As the market for low-wage people tightened, the competition for them would pull up low-end pay rates".
The fishing industry is suffering nationally, a victim of depleted stocks, tightening regulations and competition from other countries.
And no matter how one spins things, the Americans are destined for some drama once the competition tightens up.
