SPY: Large Volume Trades and Price Impact


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S&P 500 is showing signs of institutional selling: Sell Imbalance sits at -$46.2 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 $654.20. Large volume bursts in S&P 500 stocks reached 42.1 million shares worth a total of $7.1 billion in transactions. There was notable buy pressure in the Energy and Technology sectors. Overall, buy volume pressure and sell volume pressure were fairly similar during trading. There were 149 stocks that had more buy pressure on balance, and 121 stocks that had more sell pressure from large institutions. As a whole, there was a net negative -$46.2 million in dollar volume trades. A greater amount of the trading volume occurred on lit exchanges, at 62.8%, compared with 37.2% 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 -$46.2 million, however, the furthest sell imbalance for the day occurred at 1:45 PM, when the net sell dollar volume was -$64.4 million. The highest cumulative buy imbalance occurred at 11:45 AM, when the net buy hit +$536.2 million. The largest spike in imbalance came between 1:00 PM and 1:15 PM when the sell pressure surpassed the buy pressure by a 8.4 to 1 ratio.

Flow by Sector

Technology saw the most dollar volume bursts of all the SPDR sectors, with buy dollar volume exceeding sell dollar volume by $78.2 million. 30 of the Technology stocks had positive dollar balance, versus 23 that were net negative.

Individual Stocks

AES stock had the single biggest volume burst activity of all the S&P 500 stocks. Sell volume bursts surpassed buy volume by 2.5 million shares. As of this afternoon, the average trade price on sell volume was $14.10. Even though the sell pressure has been significant, the stock price has risen $0.04 on the day.

Market Data Delayed 15 Minutes