3
votes
0answers
221 views

Optimal Position Size with Transaction Costs given Forecast Mean and StDev

I have rather a challenging question. I'm hoping that someone can share their experience. I will build up the problem in steps. Let's start our thinking with the idea of a buy and hold strategy of ...
3
votes
0answers
89 views

Individual/casual investors and the bias towards blue-chip stocks?

There's quite a bit of research (example, [1]) teasing out the fact that home/casual/individual investors prefer stocks with large positive skewness. It surprised me, as I was reading a bunch of these ...
3
votes
0answers
488 views

What is the use of the Euler equation in the Ramsey growth model?

I apologise for being brief, but I don't understand how is Euler equation used in the Ramsey growth model. I am reading a textbook "Dynamic General Equilibrium Modeling" and there is mentioned about ...
3
votes
0answers
293 views

Pricing with collateral

I have been confused about many things concerning the princing of securities with collateral. We can prove that today's price of a security( fully collateralized and within the same currency) is the ...
3
votes
0answers
427 views

Real time stock volatility

Is there any need for real time weighted volatility on a tick by tick basis for equities? If you had that access to that, what could you do with it?
3
votes
0answers
130 views

What is the relation between return volatility and return rank volatility, and how can I control the latter?

I have no experience in finance, but I've been playing around with a virtual portfolio. I'm trying to control the "rank volatility" distribution - that is, the volatility of a stock's daily rank in ...
3
votes
0answers
344 views

How to balance two Forex crosses correctly to do a linear regression?

I have two cross and an account in EUR: EUR/USD GBP/USD I would like to do a balanced linear regression using R. With "balanced" I mean that I would like to normalize it by calculating the ...
3
votes
0answers
655 views

What is a good site to download historical stock 'events' such as earnings releases? [duplicate]

Possible Duplicate: What data sources are available online? Earnings and valuation data sources online I'd like to backtest some strategies involving earnings release surprises, as well ...
3
votes
0answers
536 views

signal processing + finance? [closed]

I am a postgrad student doing a master in Signal Processing and I have graduated from an engineering school I was wondering if there are any jobs in finance that are opened to people having this kind ...
3
votes
0answers
147 views

Could the Implied Volatility distribution change again? [closed]

It is well documented that following the stock market crash in 1987 the prices of options started to demonstrate skew and smile in the distribution of implied volatilities. This feature has been ...
3
votes
0answers
169 views

Benefits of Diversification and Rebalancing with negatively skewed leptokurtic return distribution?

I am missing tools to investigate this issue. I am trying to solve this question here. What kind of issues should you acknowledge over the naive diversification/rebalancing with normal distribution? ...
3
votes
0answers
193 views

What is the longest number of consecutive days that options implied volatility has stayed “extremely high” for any particular underlying?

Curious as to whether or not there is any sort of all time record. Any index, future, or stock will do. Volatility must be well above the average 1 year volatility for all periods.
3
votes
1answer
1k views

What is a persistent variable?

What is a persistent variable in the context of regression analysis? For example, dividend to price ratio (D/P) is considered to be persistent variable when used to model future returns (Stambaugh ...
3
votes
1answer
48 views

optimization to maximize number of positive days

suppose I have $N$ models, with returns $r_{n,t}$ over $1,...,T$ periods ($T>>N$). I want to find weights $w_n$ for model $n \in 1,...,N$ such the final model $p$, whose returns will be $r_{p, ...
3
votes
2answers
103 views

How to discretize a GBM under P- and Q-measures?

Under the P-measure, a geometric Brownian motion can be specified using the following SDE: $$dS_t=\mu S_tdt+\sigma S_tdW_t^P$$ and its Euler discretization is $$S_{t+\Delta t}=S_t + \mu S_t \Delta ...
3
votes
1answer
276 views

How to adapt a Moving Average period to market conditions?

I would like to know if there is some way to adapt the period of a moving average to market conditions like for instance the stop loss can be adapted to market conditions using the average true range. ...
3
votes
1answer
129 views

Volatility estimation: sampling frequency and scaling

I have a year long stock data sampled at 5 min frequency and would like to estimate monthly volatility using it. I am thinking using GARCH or TGARCH for volatility estimation. However, I am not sure ...
2
votes
3answers
2k views

Is MATLAB-generated code good enough for use in live trading?

I know that MATLAB has mechanisms for generating code, but I've never used them. Have you? If you have - is it good enough (=fast enough, I guess) to be used in live trading systems? Anything one ...
2
votes
3answers
12k views

Kalman Filter Equity Example

I am looking out for some material where I can study about Kalman Filter applied to Equity using Excel or R?
2
votes
3answers
1k views

Understanding the concept of Martingale pricing

I am a bit confused about how to formulate a problem where I have to price an option on a stock. Many papers say that stock prices are best modeled using a geometric Brownian motion (GBM), and I ...
2
votes
3answers
422 views

How can the Wiener process be nowhere differentiable but still continuous?

Taking a class in financial derivatives (book we use is Tomas Bjork´s Arbitrage theory in continuous time) but can´t understand the exact meaning of how the Wiener process is defined. In the book one ...
2
votes
2answers
152 views

Is the Brownian motion multiplication rule a definition or is it a theorem?

Is the Brownian motion multiplication rule a definition or is it a theorem? Refer to the highlight part of http://i.stack.imgur.com/doQuT.png where $dw_1(t)dw_1(t)=dt$
2
votes
2answers
399 views

Why does it “say” portfolio diversification not suitable during market turmoil?

Currently I am trying to get a hold of MPT, asset allocation and related applications. While reading a particular resource, it says diversification works best for "normal" financial markets and ...
2
votes
3answers
307 views

Estimate reasonable trade sizing based on daily volume

Let's assume we have data for daily volumes traded on some asset (and open interests as well). Now if we are planning to make a trade we don't want to fat-finger it and want it to be of a reasonable ...
2
votes
3answers
2k views

What advanced statistical techniques are quant researchers using? [closed]

Some time ago I was talking to a representative of one of the leading quantitative hedge funds. We talked about recruitment and the following had me stunned: The representative explained that they ...
2
votes
3answers
457 views

Why do long-term equity return forecast models use dependent observations?

I've been reading up on different models used to forecast the equity risk premium, and I've seen a couple of papers that had questionable methods. For example, this paper by Javier Estrada goes into ...
2
votes
1answer
150 views

why is there a cancel/replace message in FIX?

Couldn't we just cancel existing order and enter new order? Is there any other reason apart from a communication overhead that now we need to send 2 messages vs just 1 message to cancel replace?
2
votes
5answers
124 views

What is the motivation for index benchmark?

I know that many funds have local index (i.e., SPX in US) as their benchmark. Why are investors interested in such kind of returns instead of absolute returns. From the first glance I'd think one ...
2
votes
2answers
1k views

An alternative to the Gaussian distribution to describe/fit market stock returns

After the financial crisis in 2008, many people (including me) don't really believe that stock returns can be described in terms of the normal distribution (Gaussian distribution). But besides the ...
2
votes
2answers
1k views

Usefulness of simultaneously buying triangular and multiple arbitrages on the Forex

I have a limited financial background but I'm trying to figure out the usefulness of buying size-n arbitrages (n > 3), and I wonder the kind of risks - if any - associated with such a strategy. Say ...
2
votes
3answers
1k views

Probability - Generating fair outcome using unfair coin

I have been thinking a lot about the following puzzle. But, could not arrive at a solution. Can someone explain me how can you get a fair (equal probability) outcome using only an unfair coin (where ...
2
votes
3answers
109 views

French and Fama Three Factor Model - What is the correct formula?

I hope you can help me with the following question. What is the correct way to write the formula for the French and Fama Three Factor Model. I have currently found three versions of this formula, ...
2
votes
3answers
103 views

Books on Market Risk for practice problems

Are there any books with practice problems for Market Risk, with special emphasis on vanilla and exotic options? Or should I look into old exam papers from FRM as sold by Kaplan/GARP?
2
votes
4answers
210 views

How to short an option?

It appears to me that retail investors can only buy calls and puts, but not short them through any standardized way (except maybe borrowing the option from a friend ;) ). Is that correct, or how can ...
2
votes
3answers
252 views

Ran multivariate linear regression, checked normal probability plot, residuals are not normal. What can I do?

One of the required assumptions for multiple linear regression is that residuals are normally distributed, correct? After running my regression, my normal probability plot is showing the typical ...
2
votes
2answers
307 views

Why doesn't Black-Scholes assume the absence of statistical arbitrage?

Both Black-Scholes and binomial model assume that there's no risk-free arbitrage in the market. But that sounds like a very weak condition. If a trading scheme makes you gain 100 dollars with 99% ...
2
votes
1answer
165 views

Is this an inconsistency between Swap and LIBOR?

I'm a little confused by what I see as an inconsistency between quoted £ swap rates and £ LIBOR. From the FT on 25/4/14: 1-year Swap (semi-annual): Bid - $0.63\%$; Ask - $0.66\%$ LIBOR: 6-month - ...
2
votes
2answers
240 views

Question on an approximation in pricing formula

I am reading the book An Introduction to Financial Option Valuation. The following on page 58 makes me confused: For the formula: $\exp \left\{ -1.96\sigma \sqrt{t}+(\mu-0.5 \sigma^2)t ...
2
votes
2answers
179 views

Liquidity in a market risk model based on historical simulation

I would like to model liquidity effects in my risk model which is based on historical simulation. I would like to develop a practical solution that still captures liquidity effects. Most probably I ...
2
votes
2answers
2k views

Squared and Absolute Returns

I've always wondered why do one use squared or absolute returns to determine if volatility modeling is required for the return series? We understand that there are various tests for its ...
2
votes
2answers
2k views

Determining portfolio risk return in R given historical data for individual holdings?

Currently we compute portfolio risk and return via our own C# program. Historical data is stored in a SQL database. We want to compute the risk and return parameters - given a portfolio (i.e. not ...
2
votes
4answers
4k views

What are the common trading systems for hedge fund automated trading?

Is there any common trading system that is implemented by hedge fund, especially for equity or forex automated trading? I know some big names like Sungard and Bloomberg. Is there any other choices ...
2
votes
2answers
1k views

On my way to becoming a Quant [closed]

I'm currently studying for my undergrad in CS, and considering to do a grad in both CS and Math. I would like to see what you guys would recommend to prepare myself for a field as a Quant. I am ...
2
votes
2answers
193 views

Basic question on Portfolio Theory

I was revising my stuff about portfolio theory and I noticed that every single time, expected return and corresponding variance or covariance are given! (not calculating ourselves). So I'm just ...
2
votes
2answers
131 views

What are the advantages of financial modelling in R? [closed]

Recently I've found out that quantitative department in my company uses mostly R software for modeling in general. What is the advantage of modeling financial data in R instead of Excel, or some ...
2
votes
4answers
122 views

How to interpret regression coefficients with dummy explanatory variables?

I am a bit confused about the interpretation of the regression coefficients in a regression model: $R_{t}=\beta_0+\beta_1R_{mt}+\beta_2D_{t}+\epsilon_t$ where $R_{t}$ is the log return of some ...
2
votes
3answers
236 views

Physical or Real-world Probability Measure

For counterparty credit risk, in particular, for potential future exposure computation, people use the real-world probability measure to evolve the underlying risk factors. My question is that whether ...
2
votes
2answers
1k views

The future language of quant programming? [closed]

Im just about to begin the programming aspect of my education towards being a Quant. I know what languages are currently being used and how popular they are. However, I have several good friends ...
2
votes
2answers
212 views

Is it fair to assume $(ud=1)$ in the binomial tree option pricing model?

I have discussion with my colleague on why a general assumption $$ud=1$$ in binomial tree option pricing model would be necessary? I take it a simplification of the problem, otherwise, there will be ...
2
votes
4answers
2k views

Are PX_BID and PX_ASK on Bloomberg closing bid/ask? or are they daily averaged?

Bloomberg provides PX_BID and PX_ASK on a daily basis, but it's not clear exactly where these numbers come from. Are they closing bid and ask prices, or are they averaged over the entire day? For ...

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