5 ms·

Was the 30 mile cable necessary to create a speed bump. Seems to me a few lines of code would have worked.

by wehadfun 10y ago

ocschwar 10y ago
30 miles of cable gives your customers proof the speed bump will not go away with a software change.
- fleitz 10y ago
  As long as they don't install a second shorter cable, and have the software route to the second cable. The entire thing is a dog and pony show for retail investors who are even bigger suckers than the idiots running IEX. If the speed bump is for everyone and can't be removed then how do PEG orders bypass it? Are PEG orders some kind of magic that travels faster than light? Pro Tip: If a large financial institution tells you they are protecting you, they are bald faced lying to you and you are about to get a serious lesson in business. The same idiots who tell you that IEX is a good thing will also sell you actively managed mutual funds that A) under perform vanguard and B) seriously under perform once you subtract fees.
deleted 10y ago
[deleted]
wocram 10y ago
Sure it would work, but with substantially more variance than a cable.
- r00fus 10y ago
  And there's a firm guarantee that you can't cheat unless you beat the physics of light propagation... Or find a way to route around the 30m cable...
jandrese 10y ago
The point is that everybody cheats so the cable was proof that they couldn't cheat. You can't cheat the speed of light.
zhte415 10y ago
If I recall correctly, doing this through code would trip up on financial regulations. The idea for the 30 miles of cable came from hypothesising/imagining/being somewhere in New Jersey. Rough recollection of a couple of paragraphs in the book. Someone else please add if recalled incorrectly.
- mrchicity 10y ago
  Reg NMS says you cannot code a system or intentional device to delay access to a quotation. Nasdaq had tried doing this on one of their smaller markets in software many years ago, but the SEC did not approve their proposal. Geographic or network latency is not regulated by Reg NMS. For example, there is a very small stock exchange that operates out of Chicago, which is many milliseconds away even by microwave vs. New Jersey where most of the equities market trades. There are a lot of SEC comment letters claiming IEX's delay coil is an "intentional device"[1][2] but the SEC approved their exchange application because they consider the delay to be "de minimis." One area where the IEX delay differs from simple geographic latency is that IEX delays incoming orders, outgoing fills, and outgoing market data, but they do not delay market data from other exchanges. That difference makes it more difficult to "pick off" a stale order on IEX, but on the flip-side, it also means IEX orders get to free ride the price discovery happening on other markets without taking risk. This delay also raises issues because under Reg NMS, brokers have to route orders to exchanges with the best price when trading through an entire price. Since IEX's data is lagged, it may be showing a quote that is no longer accessible. Brokers would face additional slippage/execution uncertainty if they need to route at this phantom quote and wait 700 microseconds to find out it wasn't there. Canada has exchanges with delays similar to IEX, but IIROC ruled that they are not "protected" quotes so brokers have discretion not to route there if they feel it would harm their execution quality. 1: https://www.sec.gov/comments/10-222/10222-300.pdf https://www.sec.gov/comments/10-222/10222-300.pdf 2: https://www.sec.gov/comments/10-222/10222-16.pdf https://www.sec.gov/comments/10-222/10222-16.pdf

Was the 30 mile cable necessary to create a speed bump. Seems to me a few lines of code would have worked.

ocschwar 10y ago

30 miles of cable gives your customers proof the speed bump will not go away with a software change.

fleitz 10y ago
As long as they don't install a second shorter cable, and have the software route to the second cable. The entire thing is a dog and pony show for retail investors who are even bigger suckers than the idiots running IEX. If the speed bump is for everyone and can't be removed then how do PEG orders bypass it? Are PEG orders some kind of magic that travels faster than light? Pro Tip: If a large financial institution tells you they are protecting you, they are bald faced lying to you and you are about to get a serious lesson in business. The same idiots who tell you that IEX is a good thing will also sell you actively managed mutual funds that A) under perform vanguard and B) seriously under perform once you subtract fees.

deleted 10y ago

[deleted]

wocram 10y ago

Sure it would work, but with substantially more variance than a cable.

r00fus 10y ago
And there's a firm guarantee that you can't cheat unless you beat the physics of light propagation... Or find a way to route around the 30m cable...

jandrese 10y ago

The point is that everybody cheats so the cable was proof that they couldn't cheat. You can't cheat the speed of light.

zhte415 10y ago

If I recall correctly, doing this through code would trip up on financial regulations. The idea for the 30 miles of cable came from hypothesising/imagining/being somewhere in New Jersey. Rough recollection of a couple of paragraphs in the book. Someone else please add if recalled incorrectly.

mrchicity 10y ago
Reg NMS says you cannot code a system or intentional device to delay access to a quotation. Nasdaq had tried doing this on one of their smaller markets in software many years ago, but the SEC did not approve their proposal. Geographic or network latency is not regulated by Reg NMS. For example, there is a very small stock exchange that operates out of Chicago, which is many milliseconds away even by microwave vs. New Jersey where most of the equities market trades. There are a lot of SEC comment letters claiming IEX's delay coil is an "intentional device"[1][2] but the SEC approved their exchange application because they consider the delay to be "de minimis." One area where the IEX delay differs from simple geographic latency is that IEX delays incoming orders, outgoing fills, and outgoing market data, but they do not delay market data from other exchanges. That difference makes it more difficult to "pick off" a stale order on IEX, but on the flip-side, it also means IEX orders get to free ride the price discovery happening on other markets without taking risk. This delay also raises issues because under Reg NMS, brokers have to route orders to exchanges with the best price when trading through an entire price. Since IEX's data is lagged, it may be showing a quote that is no longer accessible. Brokers would face additional slippage/execution uncertainty if they need to route at this phantom quote and wait 700 microseconds to find out it wasn't there. Canada has exchanges with delays similar to IEX, but IIROC ruled that they are not "protected" quotes so brokers have discretion not to route there if they feel it would harm their execution quality. 1: https://www.sec.gov/comments/10-222/10222-300.pdf https://www.sec.gov/comments/10-222/10222-300.pdf 2: https://www.sec.gov/comments/10-222/10222-16.pdf https://www.sec.gov/comments/10-222/10222-16.pdf