WFIG's methodology is relevant today because some professional investors believe that intensifying inflation could weigh on some issuers' credit profiles. That's the view of Fitch Ratings, and should it prove accurate, it could be beneficial to some corporate bond exchange traded funds, including the WisdomTree U.S. Corporate Bond Fund (CBOE: WFIG). WFIG, which sports a 30-day SEC yield of 2.19%, follows the WisdomTree U.S. Corporate Bond Index.