mmaldacker

8 ms·

31.
by mmaldacker 12y ago
Yes, this is what a good broker does.
32.
by mmaldacker 12y ago
It's not the case. The trader wanted 20 000 shares, there was a combined amount of 24 800 shares, i.e. every exchange had less then 20 000.
33.
by mmaldacker 12y ago
That is very true, but nobody is pushing through here. The trader clearly didn't send his orders to all exchanges at the same time since other traders had time to update their prices. The article talks about milliseconds when arbitragi
34.
by mmaldacker 12y ago
The trader wanted to buy 20 000 shares at 17.38, that's a bit less than 350 000 dollars, certainly not pocket change. In fact, that was more than any individual exchange could provide, and barely enough with all exchanges combined. You
35.
by mmaldacker 12y ago
>It is as if mathematicians would start with axioms. You do not start with axioms - you start with proofs. Only when you have found a bunch of related proofs, can you come up with axioms. You end with axioms. This makes no sense. When yo
36.
by mmaldacker 12y ago
With C++11 you don't need the safe bool idiom anymore, you can simply define a "explicit operator bool() const". Since the conversion needs to be explicit, you won't have nasty surprises but it can still be used in an i
37.
by mmaldacker 12y ago
They don't make tons of money. I think Michael Lewis quotes a annual revenue of 16 billions for all the HFT companies put together. That's less then half of goldman sachs' revenue alone.
38.
by mmaldacker 12y ago
http://en.wikipedia.org/wiki/Interesting_number_paradox
39.
by mmaldacker 12y ago
What? A quick google tells me that ritz-carlton, intercontinental and other luxury hotels like kempinski all provide free wifi. I seriously doubt other luxurious hotels would charge you for wifi.
40.
by mmaldacker 12y ago
except ∑ is an upper-case sigma which corresponds to s in the latin alphabet, so why not option+s ?
41.
by mmaldacker 12y ago
Yes, look up research done by Kevin Warwick (a true mad scientist).
42.
by mmaldacker 12y ago
no love for macport?
43.
by mmaldacker 12y ago
Excellent article! People should keep in mind when saying that HFT is siphoning money out of markets that their revenue is much, much smaller than hedge funds and investment banks.
44.
by mmaldacker 12y ago
Mathematicians use x for variables simply because it's faster to write. This is less an issue when typing on a keyboard.
45.
by mmaldacker 12y ago
the example code is in java...
46.
by mmaldacker 12y ago
This is just the same rant as the classic "Why I hate frameworks" http://discuss.joelonsoftware.com/?joel.3.219431.12 but applied to Javascript instead of Java.
47.
by mmaldacker 12y ago
DOSing the exchange will get you kicked out in no time.
48.
by mmaldacker 12y ago
You are right, but computing the first n Pythagorean triples is a terrible example to show lazy evaluation.
49.
by mmaldacker 12y ago
Graphical programming is also popular for animation/cgi/special FX, e.g. XPresso in Cinema4D.
50.
by mmaldacker 12y ago
No lambdas allowed? For many other things they say "use within reason", I don't see why they can't say this for lambdas. They're finally making the stl algorithms easily usable. You don't have to write Functors
51.
by mmaldacker 13y ago
no, the higher price was due to arbitrage and not front-running. Large orders always move the market (this is simple supply/demand economics), HFT makes this move much faster than before. Large orders are usually cut-up in smaller piec
52.
by mmaldacker 13y ago
The article you linked calls it insider trading and not front running. In addition, the issue discussed in the article is about making company information public earlier to a select group of people (which is insider trading). However, most
53.
by mmaldacker 13y ago
This is called (spacial) arbitrage and this strategy has been around for a long time, well before HFT.
54.
by mmaldacker 13y ago
It's available within microseconds/milliseconds (not including time to travel over the network to wherever you are compared to the exchange's datacentre). It's made available to everyone at the same time (again, if you h
55.
by mmaldacker 13y ago
Most exchanges have public order books (i.e. available to everyone), so the information you gain with those small orders is also gained by everyone else; that's not front running.
56.
by mmaldacker 13y ago
Indeed, most arguments against HFT say it's a parasite business. However, I haven't seen anyone give precise numbers on how much money they're "stealing" compared to how much money non-HFT hedge funds and investment
57.
by mmaldacker 13y ago
>Secondly, they're adding trading volume, not liquidity. It was never hard to actually sell or buy a stock before HFT. They're not cutting down on spreads (that's what market makers do - and HFT is NOT market making). Can
58.
by mmaldacker 14y ago
This guy feels so entitled. The airline has clearly a very strict no photography policy and after being told not to take pictures, he then arrogantly explains that because he's a journalist he allows himself to do whatever he wants (take ph