gd1

31 ms·

181.
by gd1 12y ago
Does that not lead you to question your assumption that the war was "for oil in Iraq"?
182.
by gd1 12y ago
Huh? The rule is you can't place orders that you have no intention of executing at the time you place them . You're perfectly entitled to change your mind afterwards, or adjust your price as new information becomes available. You
183.
by gd1 12y ago
"For those playing along, here's the metaphor. Joe goes to market to buy sheep. Bill knows Joe is going so he sends a fast runner ahead of him to buy the... " Seriously, how many times have we discussed this issue on this sit
184.
by gd1 12y ago
Academia really is a massive wank
185.
by gd1 12y ago
>JIT'ed java code will run at native C performance... because it essentially is native C once it's been JIT'ed No way. It may be native C, but it's not native C you've hand-coded yourself.
186.
by gd1 12y ago
I've got an idea. CAPTCHAs could be replaced with suitable items of work from Amazon's Mechanical Turk. It stands to reason that these can't be solved by current computer vision algos, or else they wouldn't be on Mecha
187.
by gd1 12y ago
Can't say I agree with that. Soccer has a state too, just because they don't pause the game after every completed pass for a few adverts, a timeout, and 12 replays, doesn't mean it doesn't have state.
188.
by gd1 12y ago
Strange argument. How does modern soccer (quite attacking these days) compare to the number of goals per game in ice hockey, touchdowns per game in the NFL, or home runs in a baseball game?
189.
by gd1 12y ago
So you've accepted that greater speeds allow market makers to quote tighter, so the answer is pretty simple. The tighter a market maker is quoting the less money he is making per transaction (smaller spread), so less money is leaving t
190.
by gd1 12y ago
The speed for a market maker (largely passive and posting limit orders) isn't about how fast you can place a limit order, it is about how fast you can cancel it. It is a defensive mechanism against predators who are even quicker (ar
191.
by gd1 12y ago
>The 7-11 provides the trade functions "assortment of goods" and "transport" and as such is valuable. "Large supermarket chain" also provides the trade functions "assortment of goods" and "tra
192.
by gd1 12y ago
Again, back to my milk analogy further up, in theory you could get your milk direct from the farmer and cut out the middleman. I'm sure some of them go to markets and set up stalls and such. But the reality is, it isn't the fa
193.
by gd1 12y ago
The people who need the liquidity are the people who willingly take the liquidity. Do you think someone puts a gun to their head and forces them to submit a market order? It's a little bit like saying the guy who runs your 7-11 is a s
194.
by gd1 12y ago
An article written by a journalist, about a book written by a journalist. And neither of them have a clue. Layers upon layers of idiocy.
195.
by gd1 12y ago
Didn't I just explain it? I can't do a descending sort of every store on my local high street based on their success so far. These things snowball on the internet because the sorting and quantifying process lends itself to viral s
196.
by gd1 12y ago
Not to state the bleeding obvious, but isn't real life a little bit different to the internet? If I want to see which kickstarters have had a modicum of success, I just do a descending sort. It doesn't work like that in real life
197.
by gd1 12y ago
What are you on about? Limitless energy is rained down on us by the sun, and matter itself is conserved at the elemental level (barring nuclear processes, which are minimal on our planet). What do you suppose we are running out of?
198.
by gd1 12y ago
You send your burst a few milliseconds before an event. It chokes up C (all of those depth updates sit in his queue and he's busy for the next 50 millis churning through them). Then both you and A are free to pick him off. The thing
199.
by gd1 12y ago
>And given that quote stuffing doesn't actually hurt anyone, it's not like stopping it is a high priority. It does hurt people in some way. It increases the amount of data we need to handle. More storage space and more proces
200.
by gd1 12y ago
Sorry, missed that bit
201.
by gd1 12y ago
Obviously, well written HFTs avoid this by introducing some hysteresis to the signal. i.e. Insert an order when the signal crosses 0.5, but then only delete it if the signal falls below 0.4. Chris: You've also missed the most common c
202.
by gd1 12y ago
I just checked my database, 69235709557 rows. And I wouldn't even consider that "big data".
203.
by gd1 12y ago
>and a beach house Surely you mean a bach bro?
204.
by gd1 13y ago
How the hell does anyone determine that? If someone walked out of Id during Quake III development with Carmacks's inverse square root ( http://stackoverflow.com/questions/1349542/john-carmacks-unu... ), would
205.
by gd1 13y ago
>none of the code involved trading strategies (the really valuable stuff) Wrong. In HFT, the 'strategies' are the least complex part. They are often dead simple. A well written (fast) exchange connection is at least 70% of th
206.
by gd1 13y ago
What do shares have to do with anything? They are a small part of the picture. The spread on the e-mini S&P is currently 0.25, and it is trading at 1800. So 1/7200 is roughly 1.5 bps. This will increase the spread by (at least)
207.
by gd1 13y ago
"In fact, we can show that the spreads must widen to be larger than the tax itself being applied. If there’s a tax of 3 bps on a trade then no one’s going to trade at a spread of less than 3 bps." 6bps. To market make a spread yo
208.
by gd1 13y ago
Heh, true. I guess what I was saying is that if you freeze a basketball score at 20-18 in the second quarter, and at that point the odds are 52-48 in favour of team leading by 2, and then neither team scores for the rest of the match, then
209.
by gd1 13y ago
Why did you edit away your claim that it is to the benefit of the customers? Being a market-maker and being able to void any trades that occur during volatile periods sounds like a dream to me. No need to worry about adverse selection eh?
210.
by gd1 13y ago
How do these betting sites handle real-time events? I believe there was a case recently where a man at the Australian Open tennis in Melbourne was arrested for transmitting point information outside the stadium before it could be broadcast

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