SPY: Large Volume Trades and Price Impact


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S&P 500 is showing signs of institutional selling: Sell Imbalance hits -$279.1 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 $596.80. Large volume bursts in S&P 500 stocks reached 37.5 million shares worth a total of $6.6 billion in transactions. There was notable buy pressure in the Technology and Financial sectors. Overall, sell volume pressure exceeded buy volume pressure by 9.3%. There were 101 stocks that had more buy pressure on balance, and 120 stocks that had more sell pressure from large institutions. As a whole, there was a net negative -$279.1 million in dollar volume trades. A greater amount of the trading volume occurred on lit exchanges, at 64.4%, compared with 35.6% 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 -$279.1 million, however, the furthest sell imbalance for the day occurred at 1:15 PM, when the net sell dollar volume was -$341.3 million. The highest cumulative buy imbalance occurred at 11:00 AM, when the net buy hit +$354.9 million. The largest spike in imbalance came between 12:00 PM and 12:15 PM when the sell pressure surpassed the buy pressure by a 4.5 to 1 ratio.

Flow by Sector

Consumer Discretionary saw the highest amount of dollar volume bursts of all the SPDR sectors, with sell dollar volume exceeding buy dollar volume by $596.5 million. 10 of the Consumer Discretionary stocks had positive dollar balance, versus 12 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 1.9 million shares. As of this afternoon, the average trade price on sell volume was $334.95. The stock has dropped $21.06, indicating weakness following the trade.