Attempting to profit from short-term fluctuations in a security's price as opposed to investing in the security for use or income.

learn more… | top users | synonyms

28
votes
3answers
9k views

How can we reverse engineer a market-making algorithm (HFT)?

Consider a market participant $A$ who is mechanically following an automated liquidity providing algorithm (HFT) in a number of large cap stocks on a specific exchange. Assume furthermore that we are ...
25
votes
1answer
2k views

Is my trading strategy search methodology sound?

I'm building an algorithmic trading business. I'd be grateful for informed comments and opinions on my trading strategy search methodology. Goal Develop (profitable!) fully automated intra-day ...
23
votes
8answers
12k views

Digital Signal Processing in Trading

There is a concept of trading or observing the market with signal processing originally created by John Ehler. He wrote three books about it. Cybernetic Analysis for Stocks and Futures Rocket Science ...
20
votes
8answers
2k views

How to design a custom equity backtester?

I was thinking about writing my own backtester and I realize I have to make some assumptions. So I was hoping I could post what I am planning on doing and hopefully some of you can give me some ideas ...
17
votes
4answers
2k views

How are risk management practices applied to ML/AI-based automated trading systems

A potential issue with automated trading systems, that are based on Machine Learning (ML) and/or Artificial Intelligence (AI), is the difficulty of assessing the risk of a trade. An ML/AI algorithm ...
16
votes
5answers
4k views

Skew arbitrage: How can you realize the skewness of the underlying?

It's not clear to me how to realize skewness. In other words, how do you implement skew arbitrage? There seems to be no well-known recipe like in volatility arbitrage. Volatility arbitrage (or ...
16
votes
2answers
1k views

Statistical properties of stochastic processes for moving average trading to work

Common wisdom holds it that a moving average approach is more successful than buy-and-hold. There is quantitative evidence for that across different asset classes (see e.g. this book, or this paper ...
12
votes
6answers
4k views

Applications of Fourier theory in trading

What are fashionable applications of Fourier analysis in trading? I have heard vague ideas of applications in High Frequency Trading but can somebody provide an example, maybe a reference? Just for ...
12
votes
4answers
3k views

How to combine multiple trading algorithms?

Is it possible to combine different algorithms so as to improve trading performance? In particular, I have read that social media sentiment tracking, digital signal processing and neural networks all ...
12
votes
2answers
2k views

statistical arbitrage option overlay strategies / volatility trading

Here's an interesting trading puzzle that I would love to get the community's input on. Let's say there exists an alpha signal that does a good job of sorting equities expected excess returns over ...
11
votes
3answers
3k views

How do I find the most diversified portfolio, or least correlated subset, of stocks?

I have a trading system that chooses top 10 stocks in Nasdaq 100 ranked on relative strength and some other factors. However, I'd like to take positions in only 5 of these 10 stocks based on how ...
11
votes
4answers
3k views

Volatility pumping in practice

The fascinating thing about volatility pumping (or optimal growth portfolio, see e.g. here) is that here volatility is not the same as risk, rather it represents opportunity. Additionally it is a ...
10
votes
2answers
2k views

Is there a standard method for quantifying mean-reversion for use in directional trading?

Assuming a directional strategy (no pairs or spread trades) is there a "standard" method for quantifying mean-reversion? Should auto-correlation, variance ratios, hurst exponent, or some other measure ...
10
votes
2answers
443 views

Exploiting breakdowns in correlation of estimated volatility

In the attached image I have a plot of the rolling correlation of 90-day historic volatility (using the Garman Klass estimator based on Sinclair's Volatility Trading) of JPM v. the S&P. As can be ...
9
votes
3answers
2k views

Order submission strategies of a rational market maker?

Consider a market maker that has decided to try to make a round-trip trade in stock A in order to capture the bid-ask spread. Assume furthermore that he has no current inventory in the stock A. To ...
9
votes
2answers
1k views

How to simulate slippage

I'm backtesting a trading strategy, using free OHLC data from yahoo or google. I'm simulating friction by lopping a flat percentage (say 0.5%) off my returns for each day that I make a trade. Whats ...
8
votes
4answers
1k views

What kind of specialized hardware is used in trading?

What kind of computer hardware, in additional to the 'conventional' fare, is actually used in trading? And what languages is it typically programmed in? I'm interested in ASICs, FPGAs, that sort of ...
8
votes
2answers
1k views

What is “high frequency quoting” or “quote spam”?

What is called "high frequency quoting" or "quote spam" in the context of high frequency trading? Why do some people consider that as a problem for the market?
8
votes
3answers
700 views

What strategy would benefit most from having the fastest connection to the exchange?

Imagine that you have the fastest connection to the exchange (receive quotes 1 ms earlier than everyone else) for both stocks and derivatives. How would you benefit from this? Of course almost any ...
8
votes
1answer
411 views

How to select/construct benchmarks for black-box trading strategies?

When faced with a black box trading strategy with extensive historical data available, how would one select/construct a representative benchmark? As a trivial example, when a strategy historically ...
7
votes
4answers
1k views

Can the futures market's open interest predict commodity, treasury, and equity returns?

I came across this article and became curious. Can the futures market's open interest really predict market action?
7
votes
3answers
344 views

Is there data on market participants at a particular moment?

I am looking for data on market participants at a particular moment (or some proxy/approximation). For example, how can I tell whether mostly big players and HFTs are dominating the market in ...
7
votes
2answers
2k views

Which algorithm should I look into to kick off my research in algorithmic trading? [closed]

I have recently undertaken a research into automated algorithmic trading algorithms. The aim of the research is to focus on studying algorithmic trading and trying to improve a basic implementation ...
7
votes
3answers
224 views

Application of Control Theory in Quantitative Finance

I have recently completed an MSc in Control Systems from a top university. It seems to me that control theory must have an application within quantitative finance. I would like to apply my degree ...
7
votes
1answer
441 views

Do intraday volume and volatility share the same properties?

volatility clustering and mean reversion are very well known properties that one could use when trading. Traders, especially in options world, do take realized vol into account (e.g. by forecasting it ...
7
votes
1answer
1k views

What are the most common/popular exotics in the interest rate markets these days?

By "exotic" I mean anything that is not a plain vanilla swap, swaption, cap or floor. Also any IR hybrids if appropriate. Possible examples would be: CMS and CMS spread options Multi-callable swaps ...
6
votes
4answers
634 views

What are the options for a mathematician to break into QF without working for a fund?

I have a degree in mathematics, and I've worked as a statistician and done some programming work. I'm very strong in my math/stats/programming background and have browsed some QF books, and I'm very ...
6
votes
1answer
537 views

Are special condition identifiers (e.g. AIG+) standardized?

Suffixes indicating class, preferred, new, etc., are well defined for NASDAQ and NYSE, but I can't find anything documenting the meanings of the trailing punctuation. For example, here's some that I ...
6
votes
1answer
1k views

A generic limit order book: What are the most important queries it should be able to answer?

Assume a class LimitOrderBook which represents a limit order book in a trading system. To be able to represent the limit order book a data handler reads a feed ...
6
votes
4answers
189 views

If I have found a way to predict stocks trend with 58% accuracy, is it good?

Say I have found a way through technical analysis to predict how stocks would behave with 58% accuracy, how good is this percentage?
6
votes
2answers
352 views

Is there something like opportunistic “superstitious” trading?

This sentence in the following paper got me thinking: "Some traders [...] trade every pattern whether proven or not, expecting authentic ones to produce positive results, whilst the profits and ...
6
votes
1answer
222 views

Estimate price movement per unit of volume for daily data

I'm working on backtesting a number of stock trading strategies and need to estimate how much the execution price will likely deviate from the historical close price for that asset using daily data; ...
5
votes
4answers
692 views

Are there any brokerages which use URL-based web APIs?

We already have a list of brokerages that provide apis. What about brokerages that provide web apis? For example, Collective2 has a url-based web api for entering trades. Are there any brokerages ...
5
votes
4answers
264 views

Efficient Markets Paradox

Basically all Quant Finance theory is build on No-Arbitrage presumption and Efficient Markets Hypothesis. The known Grossman-Stiglitz Paradox says: if one can't make money from trading, one wouldn't ...
5
votes
2answers
457 views

S&P 500 list of stocks since 1960

I am looking for the S&P 500 index list of stocks for each day since January 1, 1960. Does anyone know where I can find these lists?
5
votes
1answer
349 views

With there being such a high demand for electronic trading or just trading in general why are market hours so limited?

I am curious why a lot of market hours are something like 9 to 3 or 9 to 4 pm when there is such demand and so many prop shops and more out there. I know certain markets are continuous trading but a ...
5
votes
3answers
445 views

Means of inferring trading algorithms from competition trade data

I'm analyzing trades from several participants in a trading competition, and I was wondering - are there known mechanisms for analysis and inference of the logic in a set of trades done by one ...
5
votes
4answers
4k views

What open source trading platform are available

I would like to compile a list of open source trading platforms. Something that would give an overview and comparison of different architectures and approaches.
4
votes
1answer
306 views

Why would an exchange choose one matching algorithm over another?

There are a number of different matching algorithms at different exchanges. Time-based FIFO is most common, but there is also mixed FIFO/pro-rata, pure pro-rata, size priority, etc. Why would an ...
4
votes
3answers
812 views

How to implement a long-term trade on oil?

I believe that one of the most compelling case of long-term trade is the long position on oil. Fundamentally, it seems quite clear that demands is going to grow in the future as emerging markets start ...
4
votes
3answers
310 views

Given markets usually fall fast and rise slowly, are there trading mechanisms to take advantage of this?

Per a previous question on this topic -- markets generally fall fast and rise slowly: what options strategies or other strategies can one use to take advantage of this common occurrence?
4
votes
3answers
9k views

Trade matching versus affirmation

I'm looking for a clearly articulated description of the difference between trade matching (e.g. Omgeo's CTM) and trade affirmation (e.g. Omgeo's Oasys). From what I understand, they both involve ...
4
votes
4answers
868 views

Usage of Bollinger bands

I looked through several sources on Bollinger bands and I do not see clear recipes of their usage. Wikipedia says "The use of Bollinger Bands varies widely among traders. " QSE discussion seems also ...
4
votes
1answer
304 views

Optimal Executions for Minimizing Slippage

There has been a considerable body of work for finding trading strategies that minimize the slippage wrt arrival price. For instance, the following are on of the most well known papers: [1] Robert ...
4
votes
1answer
339 views

Is there any measure that is a non-trivial combination of VWAP and TWAP?

Is there any measure that is a non-trivial combination of VWAP and TWAP? For example: \begin{equation} \textrm{VTWAP} = \frac{\textrm{VWAP}+\textrm{TWAP}}{2} \end{equation} I'm thinking about ...
4
votes
2answers
3k views

When should we use SWIFT versus FIX?

I've read documents that claim that SWIFT and FIX are not competing protocols for financial transactions and messaging. And yet, I have not come across a clear articulation of when to use SWIFT versus ...
4
votes
2answers
916 views

How to calculate optimal standard deviation bands for trading?

I am trading with standard deviation bands (6 bands) on de-trended data. How can I find the most profitable signals with neural network or GA with standard deviation bands? Should I first find the ...
4
votes
3answers
115 views

Technical analysis - Calculating Aroon Indicator Serie

I'm trying to build a class to create Aroon series. But it seems I don't understand the steps well. I'm not sure about what purpose I have to use the period parameter. Here is my first attempt: ...
4
votes
2answers
185 views

Impact on bid/offer due to volume/size of trades placed

When observing bid/offer in the market I came across a question. How much trading a bond would impact its spread for subsequent trades ie. what is the impact on bid/offer due to volume/size of ...
4
votes
0answers
489 views

How to determine ratios for mean-reverting basket

Suppose I have a basket of 3 securities A, B, and C. I believe that the basket is cointegrated and I want to create a mean-reverting trade. I fit the model: ...