Old economy is actually the traditional company/industry that running businesses physically before the dot.com era. These old economy industry did not involve much in the investment which means that they seldom offer new investment potential for a company’s cash. The digital economy nowadays is using the latest technology to work together in their company/industry.
On the other hand, old-economy stocks tend to be valued, based on are more stable business models and less robust growth expectations, resulting in less variance of analyst expectations and more accurate earnings estimates.
Digital Economy refers to an economy that is based on digital technologies. The digital economy is also sometimes called the Internet Economy, the New Economy, or Web Economy. Increasingly, the “digital economy” is intertwined with the traditional economy making a clear delineation harder.