5,278 reputation
21357
bio website chrisaycock.com
location New York, NY
age 31
visits member for 2 years, 3 months
seen 6 hours ago
stats profile views 1,513

I do high-frequency trading, mostly in C++ and q/kdb+. I am a pro tem moderator of Quant SE. My views are my own and do not reflect the same of my employer.

My favorite answers:

Separating the wheat from the chaff

How much data is needed to validate a trading strategy

Time-series similarity measures

Column-oriented storage for tick data

A new programming language can only succeed if it capitalizes on an emerging frontier


20h
comment Quality of GAINDATA timestamps
I didn't downvote you. I rolled-back your question because you edited it to leave a comment asking why you were downvoted. You aren't new to Stack Exchange; you know by now that questions do not have comments asking why they were downvoted. Stop doing this.
1d
comment Is Unexpected Loss ever used in Basel II?
Could you rewrite the equations here to use $\LaTeX$?
2d
comment Which brokers offer a .NET stock trading API?
What is it with you and the TradeStation WebAPI?! You know, we do expect people who post on here to actually work as professional quants. See the FAQ.
2d
comment Option trading API other than Interactive Brokers
TradeStation has already been mentioned a few times.
May
16
comment Market Exposure and Hedging
Do you know what a risk model is, or how to do principal component analysis? It sounds like you just want to hedge against few factors. So pick some sector ETFs that replicate your portfolio's primary risk factors.
May
15
comment Quantitative Finance in Asset Allocation
This is a site intended for professionals, i.e. people who do this for a living. See the FAQ.
May
15
comment Profiting from price discrepancies between stock exchanges
@lmorin This is turning into an extended discussion; you should post your scenario as a separate question. As part of that, think about a specific example first.
May
15
comment Profiting from price discrepancies between stock exchanges
@lmorin Any exchange could just make a rule that states no order may be canceled until one second after submission. But really, is "instant" cancellation a problem? Should Amazon require shoppers to spend a certain amount of time on their site before allowing them to cancel their shopping basket?
May
15
comment Profiting from price discrepancies between stock exchanges
@GoodGuyMike HFT is the media-friendly term for automated market making. Some HFTs will occasionally engage in "pick-offs" against each other, but mostly the game is providing liquidity. NANEX is claiming that HFTs "jam" the networks with quotes for nefarious purposes. That's a pretty strong accusation.
May
14
comment Basic Trading Strategies based on mean-reversion / momentum
This is a site intended for professionals, i.e. people who work in the industry. See the FAQ.
May
11
comment State-space representation of Ornstein–Uhlenbeck and CIR processes
@Veeken I rejected your edit because changing an equation can fundamentally alter the question. If you suspect a formula is wrong, the best bet is to leave a comment as you've done here. All the same, thank you for pointing-out a suspicious post.
May
10
comment Is there an all Java options-pricing library (preferably open source) besides jquantlib?
Can you update your answer to state this? Also, JRockit isn't a real-time java. Did you mean a JIT?
May
8
comment Best way to store hourly/daily options data for research purposes
Have you seen this earlier question? The topic of tick storage comes-up a lot on here.
May
6
comment How to test the efficiency of Exponential Moving Averages as a trading startegy?
This is a site intended for professional quants, i.e. people who do this for a living. I migrated your last question to bitcoin.SE (where you actually had cross-posted) but you didn't seem to take the hint. I'm closing this question.
May
5
comment Multi Factor Credit Risk Models
Can you summarize the contents of that presentation in the body of your answer?
May
2
comment Call vs. Put Option
Comments have been purged.
May
2
comment Arbitrage: Difference Between Liquidity Taking and Liquidity Making
This is a site intended for professional quants, i.e. who do this for a living. See the FAQ.
Apr
29
comment Wich online Forex Brokers accept connections with black box solutions developed in visual basic?
Trading on margin involves a lot of risk and is for sophisticated investors only. If you don't have that kind of capital, then leverage is probably not for you. This is a site for professional quants, ie people who do this for a living. See the FAQ.
Apr
29
comment How to use PCA for trading
Sounds like a hammer looking for a nail.
Apr
28
comment Good source for S&P multiplier
Bloomberg works.