Bridging the Confidence Gap In the world of finance, the effects of the "confidence gap" can be especially apparent. Share | Related Content The Rule of 72 Do you know how long it may take for your investments to double in value? The Rule of 72 is a quick way to figure it out. Required Reading: The Economic Report of the President The Economic Report of the President can help identify the forces driving — or dragging — the economy. Contributing to an IRA? Determine if you are eligible to contribute to a traditional or Roth IRA.