Volume Weighted Average Price
Volume Weighted Average Price (VWAP) is the average price at which a security has traded throughout a trading day, weighted by the volume of each transaction, giving greater influence to price levels where larger quantities of shares have historically changed hands.
VWAP is calculated by dividing the cumulative sum of (price × volume) for every transaction that has occurred during the trading day by the total cumulative volume traded. It resets to zero at the open of each trading day and accumulates throughout the session. The formula is: VWAP = Σ(Price × Volume) / Σ(Volume), computed cumulatively from the open.
VWAP has two primary applications in markets. First, it serves as a widely used benchmark for institutional trade execution. Large institutional investors — pension funds, mutual funds, and index funds — frequently measure the quality of their trade executions against VWAP. A buy order that was executed at an average price below the day's VWAP is considered to have achieved 'positive slippage' or execution above the benchmark, while a buy executed above VWAP is considered to have underperformed the benchmark. Many institutional trading algorithms are specifically designed to execute orders at or near VWAP to minimize market impact.
Second, VWAP is widely used in technical analysis as a dynamic reference level. Active traders and technical analysts study the historical relationship between a security's current price and its intraday VWAP. In many historical trading day observations, periods where price has traded above VWAP have been associated with intraday upward momentum, while sustained trading below VWAP has been associated with intraday downward momentum. These are historical observations about intraday price behavior, not predictions.
Because VWAP resets daily, it is most relevant as an intraday tool. Some practitioners apply VWAP over longer periods (weekly or monthly VWAP) for longer-term analysis, though the indicator's core utility is in characterizing intraday price and volume dynamics. VWAP differs from a simple moving average in that it incorporates volume — giving mathematically greater weight to prices at which more shares were actually traded — making it a price level that reflects where the bulk of the day's economic activity historically occurred.