A huge data set has confirmed a long-theorized relationship between the size of stock trades and the impact on prices.

Root, Inc. is a technology insurance company, which engages in the provision of insurance services. It offers mobile telematics and technology platforms to segment individual risk based on complex ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Robert Kelly is managing director of XTS ...