On Missing Indicators And Confirmation Bias

 | Mar 10, 2014 11:20PM ET

h2 Objectivity!/h2

One of the most important questions for consumers of punditry is whether the source is intellectually honest about methods and interpretation. The test is a simple one:

  1. If an indicator is cited as support for a market position, take note.
  2. If the observer decides to change indicators, there should be a logical explanation – best done when it is not an excuse for maintaining current viewpoints.
  3. If the indicator is dropped when it no longer supports the pre-conceived viewpoint, be warned!

Since I read widely from many sources, I am often intrigued by provocative claims. If you want to challenge your own biases, you must be willing to see an opposing viewpoint. If you learn that a source has turned a blind eye that should be a red flag.

h3 Two Examples/h3

Case one: There has been a lot of recent buzz about high levels of margin at the NYSE. For a time, your favorite conspiracy site insisted that this had nothing to do with short interest, since that was declining as the S&P was rising. Here was the chart: