SPY: Large Volume Trades and Price Impact


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S&P 500 is showing signs of institutional selling: Sell Imbalance hits -$1.4 billion

Following the Big Money in S&P 500 Stocks

So far in trading today, the S&P 500 ETF is down 1.9%. SPY stock last traded at $572.08. Large volume bursts in S&P 500 stocks reached 42.8 million shares worth a total of $5.8 billion in transactions. There was notable buy pressure in the Industrials and Health Care sectors. Overall, sell volume pressure exceeded buy volume pressure by a 1.6 to 1 ratio. There were 96 stocks that had more buy pressure on balance, and 126 stocks that had more sell pressure from large institutions. As a whole, there was a net negative -$1.4 billion in dollar volume trades. The trading volume was nearly equal between lit exchanges and trades matched up on dark pool venues. To learn more about large volume trades, check out our help section.

Daily Chart: Large Volume Bursts Over Time

As you can see from the chart below, the most recent cumulative sell imbalance is -$1.4 billion, however, the furthest sell imbalance for the day occurred at 1:45 PM, when the net sell dollar volume was -$1.4 billion. The highest cumulative buy imbalance occurred at 10:45 AM, when the net buy hit +$125.0 million. The largest spike in imbalance came between 9:30 AM and 9:45 AM when the sell pressure surpassed the buy pressure by a 4.8 to 1 ratio.

Flow by Sector

Technology saw the most dollar volume bursts of all the SPDR sectors, with sell dollar volume exceeding buy dollar volume by $634.9 million. 12 of the Technology stocks had positive dollar balance, versus 25 that were net negative.

Individual Stocks

NVDA stock had the single biggest volume burst activity of all the S&P 500 stocks. Sell volume bursts exceeded buy volume by 3.4 million shares. As of this afternoon, the average trade price on sell volume was $112.57. The stock has dropped $6.16, indicating weakness following the trade.