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Investments glossary

Rate of Change (ROC)

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Quotes of the day:

Truth may be stretched, but cannot be broken, and always gets above falsehood, as oil does above water.

— Miguel de Cervantes

The rate of change – ROC – is the speed at which a variable changes over a specific period of time. ROC is often used when speaking about momentum, and it can generally be expressed as a ratio between a change in one variable relative to a corresponding change in another; graphically, the rate of change is represented by the slope of a line. The ROC is often illustrated by the Greek letter delta.


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