R square (R


Square of the correlation coefficient. The proportion of the variability in one series that can be explained by the variability of one or more other series a regression model. A measure of the quality of fit. 100% R-square means perfect predictability.

Investing Essentials

Copyright © 2011 Campbell R. Harvey, Professor of Finance, Fuqua School of Business at Duke University

Term of the Day

Government obligations

U.S. government-backed debt instruments, which are considered among the safest investments possible, including Treasury bonds, bills, and notes, and savings bonds.

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