The stock market's reaching new highs, and that has people wondering how long it will be before profit-takers cause a sell-off. There's no telling what the market may do in the short term, but our Fools think this is a good time to add Verizon Communications (NYSE:VZ), Teva Pharmaceutical (NYSE:TEVA), and Philip Morris International (NYSE:PM) to portfolios, regardless of whether the broader market pops or drops. Read on to learn why they think these companies should be at the top of your list of big-cap stocks to buy this month.

Connect to this wireless play

Chris Neiger (Verizon): Verizon Communications has been the dominant wireless telecom in the U.S. for years, and all signs suggest that the carrier will hold that position despite increasing competition from its rivals.

For starters, Verizon still has a commanding lead when it comes wireless subscribers. At the end of the second quarter, Verizon had about 152 million subscribers, while its closest competitor, AT&T, had 147 million. What's amazing about Verizon's subscriber numbers is that despite its large size and often more expensive plans, the carrier is still able to grow its subscribers significantly. In the second quarter of this year, Verizon added 531,000 net postpaid subscribers.