Impact Technology has on the Market
The liquidity of US Stock
Markets have been greatly impacted by the rapid advancement of smart computer
algorithms working in conjunction with ECNs (Electronics Communication
Networks), ATSs (Alternative Trading systems) and Dark Pools. The automation of smart computers along
with liquidity in off exchange venues has contributed to a dramatic increase in
trading on these alternative venues and have caused quite a dramatic decrease
in volume traded on registered exchanges.
It is this high speed coupled
with the choice of using an ATS for fast execution and low cost that was a
catalyst to what we now refer to as High Frequency Trading (HFT). HFT firms incorporate the speed from smart
computer algorithms which gives them the ability to see orders in process, and
buy them up for themselves. Since they
can see all pending orders, they know if they’ll be able to turn around and
sell at a slightly higher price, even in the sub-penny price range. On high-volume orders, fractions of a penny
add up to millions of dollars.
Sub-Pennying
This combination of speed from
computers and liquidity in ATSs, added to the decimalization of the markets in
2001 has spurred another predatory practice referred to sub-pennying, which goes right along
with HFT, and occurs regularly today.
Sub-pennying occurs when a broker gets in front of a
displayed order by 1/100th of a penny, or .0001. This is all done
inconspicuously with a computer algorithm program that allows them to see an
order is pending, so they’ll buy up shares within a sub penny difference.
Sub-Penny trades occur because POF firms have to validate
taking the trade for themselves, so they improve the price by .0001. The market
is showing $10.00 x $10.01, so when an order comes to the POF firm to sell at
$10.00, they fill it themselves at $10.0001, letting them claim they improved
the price for the customer. The truth is that there is probably a bid in a dark
pool at $10.005, that the POF firm will then sell, immediately making
themselves .0049/share in the process. Even if there isn't anything in the
middle that they can immediately get out of the trade, they are far from the
bid, which is what all bidders in the market at $10.00 wish they could be. All other bidders never get the chance, however, as the POF
firm steps in front of them without ever having to risk putting a bid into the
open market.
This leaves traders experiencing whiplash in a
scenario of “here one minute (second in this scenario) and gone the next” when
attempting to execute their orders.
Most traders that we talk to agree – a Trade-At Rule is
necessary.
Headquartered in Chicago, Great Point
Capital, LLC, is a member of FINRA and has been serving the trading community
since 2001. Our mission is to be the leader in the equity day trading community
by giving the best traders the tools and support to make the most of their
trading careers. Contact Great Point Capital, LLC today, in either our Chicago Office, or our Austin Office, to learn more about how we can
successfully trade together with high performance results.