6,243 reputation
31660
bio website chrisaycock.com
location New York, NY
age 33
visits member for 3 years, 9 months
seen Nov 12 at 21:39

I do high-frequency trading, mostly in C++ and Python (formerly q/kdb+). 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


Jul
7
revised How to calculate expected return based on historical data for Mean Variance Analysis
Proper punctuation
Jul
3
comment Comparing backtesting returns with real trading returns
I wish @shabbychef would cross-post his answer here.
Jul
2
comment Usage of NoSQL storage in Finance
@Dirk Yes, Sybase IQ (now part of SAP) is also in this space. There's Vhayu (part of Thomson Reuters) too, though I haven't heard much from them in a while. I'm still confused as to what SciDB actually does.
Jul
2
comment Usage of NoSQL storage in Finance
In the finance world, most quants use column-oriented storage. This is particularly true for time-series data, like tick history.
Jul
2
comment Reading recommendation on using statistical analysis in online fraud prevention
I'm not sure what fraud prevention has to do with Quantitative Finance.
Jul
2
comment Usage of NoSQL storage in Finance
Kdb+ and OneTick are column-oriented stores, which is a frequent topic here. Stonebreaker's own column-oriented DB is Vertica, which was recently bought by HP. (VoltDB is row-oriented and intended for OLTP applications, whereas the column-oriented products here are intended for OLAP.)
Jun
26
comment Innovative ways of visualizing financial data
You should point-out that you are affiliated with the service you're mentioning. You know, potential conflict of interest and all.
Jun
23
revised Measuring liquidity
Made the quote size more clear as the focus of the answer.
Jun
23
comment Control for bid/ask bounce in high-frequency trade data?
Given sufficient liquidity, I just mark positions to mid; the last trade price can highly variable.
Jun
22
comment Measuring liquidity
@Ted AAPL's lower basis-point spread only exists because sub-penny quotes aren't currently allowed. Also, my answer was about quote size; AAPL's unnatural "advantage" disappears once the client places larger orders.
Jun
22
answered Measuring liquidity
Jun
20
comment Divergence issue with my monte carlo pricer…
Damn, Dirk. Three accepts in a row. Are you coming back to Quant.SE?
Jun
20
revised How does order fulfillment proceed with larger orders?
More jargony.
Jun
20
revised How can I quantitatively test the validity of momentum indicators?
Readability
Jun
20
comment How stressful is work of quants?
From the FAQ: The Quantitative Finance Stack Exchange is intended for professionals and academics involved in securities valuations, risk modeling, and other topics related to quant modeling or trading. Basically, if you aren't earning a living at this, it's probably off topic.
Jun
20
revised Divergence issue with my monte carlo pricer…
No signature line on SE.
Jun
19
revised Alternate money management strategies to Kelly?
Embedded Amazon link.
Jun
18
answered Alternate money management strategies to Kelly?
Jun
18
comment Free/cheap source of structured historical quarterly filings?
Welcome to Quant.SE. I see you've posted this four times; I also see you've posted something similar on Stack Overflow. I hope you can add more to this site than just links to your own company's interests.
Jun
17
comment Monte carlo methods for vanilla european options and Ito's lemma.
@balteo You should edit your question to be more clear about what you meant to ask.