Spectrum, which supports the transmission of sound, data, and video, is critical to the implementation of mobile connected society. Federal Communications Commission (FCC) has been seeking policies that offer more spectrum access opportunities, such as secondary spectrum market and TV white space. In this paper, we develop the idea of trading spectrum in Interference Right. It means to alleviate the spectrum scarcity by cooperative spectrum usage and making the spectrum market as liquid as possible. We use some plausible case studies to illustrate the characteristics and features. The paper therefore includes a detailed description of trading procedures along with some first order quantitative modeling of the cases coupled with qualitative analysis.