SPY: Large Volume Trades and Price Impact


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S&P 500 is indicating institutional buying: Buy Imbalance hits +$374.4 million

Following the Big Money in S&P 500 Stocks

So far in trading today, the S&P 500 ETF is up 0.8%. SPY stock last traded at $560.74. Large volume bursts in S&P 500 stocks reached 30.8 million shares worth a total of $3.8 billion in transactions. There was notable buy pressure in the Technology and Consumer Discretionary sectors. Overall, buy volume pressure outpaced sell volume pressure by a 1.2 to 1 ratio. There were 123 stocks that had more buy pressure on balance, and 93 stocks that had more sell pressure from large institutions. As a whole, there was a net positive +$374.4 million in dollar volume trades. A greater amount of the trading volume occurred on lit exchanges, at 64.0%, compared with 36.0% 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 buy imbalance is +$374.4 million, however, the peak buy imbalance for the day occurred at 10:30 AM, when the net buy dollar volume was +$680.6 million. The largest spike in imbalance came between 10:00 AM and 10:15 AM when the buy pressure outweighed the sell pressure by a 20.4 to 1 ratio.

Flow by Sector

Technology had the most dollar volume bursts of all the SPDR sectors, with buy dollar volume exceeding sell dollar volume by $260.6 million. 20 of the Technology 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 exceeded sell volume by 1.2 million shares. As of this afternoon, the average purchase price on buy volume was $128.23. The stock price increased $4.59, indicating strength following the trade.