"Turn Negative Numbers to Purple" is a Chrome add-on developed by Josh Bernard. This free program is designed to change the color of negative values in Google Finance to purple. Inspired by the article "It’s the Little Things That Can Color an Investor’s Outlook" by Jason Zweig of wsj.com, the add-on aims to provide a visual cue for investors and help them easily identify negative numbers.

The idea behind this add-on is based on research conducted by finance scholars William Bazley and Henrik Cronqvist of the University of Miami, along with marketing professor Milica Mormann of Southern Methodist University. The article also features insights from Daniel Egan, director of behavioral finance and investments at Betterment.

With "Turn Negative Numbers to Purple," users can enhance their experience on Google Finance by quickly differentiating between positive and negative values. This simple yet effective solution can be a helpful tool for investors who want to stay informed about their financial portfolios.