SPY: Stocks with Huge Volume Spikes


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S&P 500 is showing signs of institutional selling: Sell Imbalance sits at -$404.5 million

Following the Big Money in S&P 500 Stocks

So far in trading today, the S&P 500 ETF is down 0.4%. SPY stock last traded at $604.10. Large volume bursts in S&P 500 stocks reached 50.2 million shares worth a total of $8.6 billion in transactions. There was notable buy pressure in the Technology and Communication Services sectors. Overall, sell volume pressure surpassed buy volume pressure by 10.4%. There were 119 stocks that had more buy pressure on balance, and 136 stocks that had more sell pressure from large institutions. As a whole, there was a net negative -$404.5 million in dollar volume trades. A greater amount of the trading volume occurred on lit exchanges, at 63.8%, compared with 36.2% being transacted in the dark pool. 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 -$404.5 million, however, the furthest sell imbalance for the day occurred at 12:15 PM, when the net sell dollar volume was -$604.9 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 3.6 to 1 ratio.

Flow by Sector

Consumer Discretionary had the largest dollar volume bursts of all the SPDR sectors, with sell dollar volume exceeding buy dollar volume by $467.0 million. 12 of the Consumer Discretionary stocks had positive dollar balance, versus 15 that were net negative.

Individual Stocks

NVDA stock had the single biggest volume burst activity of all the S&P 500 stocks. Buy volume bursts surpassed sell volume by 749,110 shares. As of this afternoon, the average purchase price on buy volume was $129.42. Despite the buy pressure, the stock has dropped $2.33 on the day.