Two recent and apparently unrelated events are further evidence of a tectonic shift under way in financial news.

First, in January, The Wall Street Journal introduced a new design and approach that reduced its size by about 20% and added emphasis on analysis at the expense of spot news coverage. Then, a few weeks later, Roger Ailes, the head of Fox News, announced that the Rupert Murdoch-owned media conglomerate would launch a business channel to compete with CNBC and Bloomberg.

The ...