It was just Friday when a pithy Bob Pisani noted that investor confidence in markets is up because there have been no market malfunctions recently... he spoke too soon. As Nanex's Eric Hunsader reports, an apparent malfunction at BATS-Y has caused dozens of flash crashes... including in AAPL.
#ALERT [8] Malfunction at BATS-Y? causes dozens of flash crashes
— Eric Scott Hunsader (@nanexllc) August 18, 2014 [9]
BAT-Y issue confined to Nasdaq symbols A-M
— Eric Scott Hunsader (@nanexllc) August 18, 2014 [10]
BAT-Y - now the symbols N-Z
— Eric Scott Hunsader (@nanexllc) August 18, 2014 [11]
Appears as if trades from beginning of the day were blasted through
— Eric Scott Hunsader (@nanexllc) August 18, 2014 [12]
Were BAT-Y trades not reporting until 11:50 ?
— Eric Scott Hunsader (@nanexllc) August 18, 2014 [13]
Apparently, BAT-Y trades on Nasdaq weren't being transmitted until 11:50 - and then all at once since open
— Eric Scott Hunsader (@nanexllc) August 18, 2014 [14]
Looks like BAT-Y stopped sending trades to the SIP around 10am - came back at 11:50 and sent from 10am
— Eric Scott Hunsader (@nanexllc) August 18, 2014 [15]
And this happened...
Efficiant markets...
And close up via Nanex,
Chart of $AAPL [18] trades from BAT-Y (NBBO is dark gray shading) pic.twitter.com/H7ouRicdIP [19]
— Eric Scott Hunsader (@nanexllc) August 18, 2014 [20]
Chart of $AAPL [18] quotes from BAT-Y: quotes weren't affected pic.twitter.com/lDbBo5MYbS [21]
— Eric Scott Hunsader (@nanexllc) August 18, 2014 [22]
You can see the 2 separate blasts of trades from BAT-Y. Chart of trades in Nq listed stocks: pic.twitter.com/LsFtZwclvC [23]
— Eric Scott Hunsader (@nanexllc) August 18, 2014 [24]


