S&P 500 is showing signs of institutional selling: Sell Imbalance reaches -$143.4 million
Following the Big Money in S&P 500 Stocks
So far in trading today, the S&P 500 ETF is unchanged. SPY stock last traded at $663.73. Large volume bursts in S&P 500 stocks reached 41.8 million shares worth a total of $7.6 billion in transactions. There was notable buy pressure in the Technology and Consumer Staples sectors. Overall, sell volume pressure outpaced buy volume pressure by 4.1%. There were 133 stocks that had more buy pressure on balance, and 140 stocks that had more sell pressure from large institutions. As a whole, there was a net negative -$143.4 million in dollar volume trades. A greater amount of the trading volume occurred on lit exchanges, at 57.6%, compared with 42.4% 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 -$143.4 million, however, the furthest sell imbalance for the day occurred at 12:00 PM, when the net sell dollar volume was -$312.1 million. The highest cumulative buy imbalance occurred at 10:00 AM, when the net buy hit +$431.6 million. The largest spike in imbalance came between 10:45 AM and 11:00 AM when the sell pressure surpassed the buy pressure by a 4.3 to 1 ratio.
Flow by Sector
Technology had the highest amount of dollar volume bursts of all the SPDR sectors, with buy dollar volume exceeding sell dollar volume by $168.1 million. 19 of the Technology stocks had positive dollar balance, versus 29 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 surpassed buy volume by 439,032 shares. As of this afternoon, the average trade price on sell volume was $182.51. The stock price decreased $1.97, indicating weakness following the trade.

