SPY: Large Volume Trades and Price Impact


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S&P 500 is indicating institutional selling: Sell Imbalance sits at -$21.5 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 $599.08. Large volume bursts in S&P 500 stocks reached 40.6 million shares worth a total of $5.6 billion in transactions. There was notable buy pressure in the Technology and Communication Services sectors. Overall, buy volume pressure and sell volume pressure were fairly similar during trading. There were 132 stocks that had more buy pressure on balance, and 102 stocks that had more sell pressure from large institutions. As a whole, there was a net negative -$21.5 million in dollar volume trades. A greater amount of the trading volume occurred on lit exchanges, at 57.7%, compared with 42.3% 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 -$21.5 million, however, the furthest sell imbalance for the day occurred at 11:00 AM, when the net sell dollar volume was -$399.0 million. The highest cumulative buy imbalance occurred at 9:45 AM, when the net buy hit +$259.9 million. The largest spike in imbalance came between 10:00 AM and 10:15 AM when the sell pressure surpassed the buy pressure by a 4.8 to 1 ratio.

Flow by Sector

Consumer Discretionary experienced the most dollar volume bursts of all the SPDR sectors, with sell dollar volume exceeding buy dollar volume by $102.8 million. 14 of the Consumer Discretionary stocks had positive dollar balance, versus 7 that were net negative.

Individual Stocks

TSLA stock had the single biggest volume burst activity of all the S&P 500 stocks. Sell volume bursts exceeded buy volume by 795,327 shares. As of this afternoon, the average trade price on sell volume was $331.11. Even though the sell pressure has been significant, the stock price has risen $1.37 on the day.