“The attached liquidity analysis by Abel-Noser indicates that the US stock market has now become a concentrated pool in which just the top 99 stocks account for 50.09% of total domestic trading volume. In June, the top 20 stocks accounted for 28.94% of all domestic volume, an increase of 2.2% over May’s 26.7% and a record.
The HFT algos are increasingly trading less and less stocks in their attempt to corner just the most liquid stocks. Indicatively, the top 978 names represented 90.01% of total domestic volume, while the remaining 17,597 accounted for just 10% of all dollars traded. Of this, the bottom 12,112 stocks represented less than 0.05% of daily domestic volume. The top 5, or better known as the HFT’s dream team, were: SPY (10.5% of total domestic volume in June), AAPL (2.84%), IWM (1.92%), QQQQ (1.71%) and BP (1.39%). Oddly enough such previous HFT darlings as C and BAC barely made the top 10.”
http://www.zerohedge.com/article/99-stocks-account-half-days-trading-volume-liquidity-concentrates-ever-fewer-stocks
Here is why there are crazy violent moves that don’t seem to make any sense. They don’t…..the robots don’t care about fundamentals.
I’m sure the PPT has learned that goosing the Emini will set the robots loose on SPY.
