On-Balance Volume (OBV)

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DEFINITION of 'On-Balance Volume (OBV)'

A momentum indicator that uses volume flow to predict changes in stock price. On Balance Volume is a metric developed by Joseph Granville in the 1960s. He believed that, when volume increases sharply without a significant change in the stock’s price, the price will eventually jump upward, and vice versa. 

INVESTOPEDIA EXPLAINS 'On-Balance Volume (OBV)'

The theory behind OBV is based on the distinction between smart money – namely, institutional investors – and less sophisticated retail investors. As mutual funds and pension funds begin to buy into an issue that retail investors are selling, volume may increase even as the price remains relatively level. Eventually, volume drives the price upward. At that point, larger investors begin to sell, and smaller investors begin buying.

The following chart depicts OBV. If today’s close is greater than yesterday’s close, then today's volume is added to yesterday’s OBV, and is considered “up volume.” However, if today’s close is less than yesterday’s close, today’s volume is subtracted from yesterday’s OBV and is considered “down volume.”

 

On-Balance Volume

Chart created with TradeStation

 

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