summing up an abbreviation is a shortening of a word or a phrase an acronym is an abbreviation that forms a word an initialism is an abbreviation that uses the first letter of each word in the phrase thus some but not all initialisms are acronyms
ROI, or return on investment, is a common business term used to identify past and potential financial returns. Managers and executives look to the ROI of a project or endeavor because this indicates how successful a venture will be.
Return on investment is the profit expressed as a percentage of the initial investment. Profit includes income and capital gains. Risk is the possibility that your investment will lose money. With the exception of U.S. Treasury bonds, which are considered risk-free assets, all investments carry some degree of risk.