No. 1 domestic wireless carrier Verizon (VZ 1.17%) Wireless recently announced it was tightening upgrade policies, extending the time frame that consumers have to wait to a full 24 months. Carriers have also been trying to reduce subsidies via platform competition. That's an incremental negative for Apple (AAPL -0.35%), since the company still relies heavily on subsidies to boost iPhone prices, but not as bad as if AT&T (T 1.02%) had made the move (it sells more iPhones).

In the video below, Fool contributor Evan Niu, CFA, explains how this might affect Apple investors.

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