# All Questions

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### Historic market cap/outstanding shares [duplicate]

Is there someway to get the historic market capitalization/outstanding shares of stocks traded in US exchanges ?
27 views

### explanation for preference of volatilities in option premium quotes [duplicate]

could any one suggest an explanation for why premium in option markets (currency or otherwise) are quoted as volatilities rather than (premium/abs(spot price - settlement price)) or some other ...
96 views

### Is there a strong solution to $\frac{dS}{S}=\sigma(S)dw$?

Does someone know if there is a strong solution for this SDE : $$\frac{dS_t}{S_t}=\sigma(S_t)dW_t$$ where $$\sigma(S)=\begin{cases} 1\;\;\;S>1\\2\;\;\;S\leq 1 \end{cases}$$ $S_0=1$ and $W_t$ is ...
268 views

### what is a reasonable beta in CAPM?

I want to predict expected returns for assets using a CAPM, to calculate unexpected (unpredictable, idiosyncratic, non-systemic) returns in portfolios. My CAPM estimated on monthly total gross ...
276 views

### Time-varying correlation via state-space representation and Kalman filter

Let a linear time-varying mode like this one: $y_{t}=\alpha_{t}+\beta_{t}x_{t}+\epsilon_{t}$. You can also suppress the constant term to simplify this example: $y_{t}=\beta_{t}x_{t}+\epsilon_{t}$. ...
73 views

### Real value of small numbers of shares of company stock

What is the real value of a single share of company stock? Let's ignore the "the value is what someone is willing to pay for it" angle. At some point, there has to be a real inherent value to ...
651 views

### fetch from yahoo! finance database - varying number of ticks

To test a model with real-life data, I used the fetch-function in matlab to connect to the database of yahoo! finance. My code to try and get 7 different assets' returns is the following: ...
147 views

### close form for stochastic integral

I am new to stochastic calculus. Can I know how to compute the close-form solution for $$\int_0^t \exp(\alpha s - \sigma W_s) \; ds$$ and $$\int_0^t \exp(\alpha s - \sigma W_s) \; dW_s.$$ I encounter ...
273 views

### Fluid dynamics for order book depth modelling

Would someone be able to give me an idea what type of fluid dynamics I could look at for modelling the order book? My background is more signals-related maths (correlation, covariance, fourier etc). ...
36 views

### How to make a historical index of a group of materials in which the set of materials changes every month?

The question may sound simple however for the moment it is a brainteaser to get it right, let me explain: the exercise is to be done on +/- 200 groups of materials (matgroups) one matgroup can ...
254 views

### Simple EOD computations for tick data

As part of End-Of-Day calculations once a particular market/exchange has closed for all the tickers traded on that market one may typically compute the following properties: OHLC Bid/Ask Price ...
81 views

### Can the equity premium puzzle be explained by volatility-induced financial growth?

Citing the paper Volatility-induced ﬁnancial growth (2007) by Dempster et al.: when asset returns are stationary ergodic, their volatility, together with any ﬁxed-mix trading strategy, generates a ...
72 views

### % Return on backtest with variable positions and notional amounts

I have a 14 year backtest for a systematic strategy that uses a static notional per each position. On any given day I could have multiple positions long and short and notional long and short. How do ...
191 views

### Required Rate of Return vs Expected Return

I faced a problem that gives the following information: market risk premium, and risk free rate is given You currently have a portfolio of amount of x, beta b1. Now there is a new investment ...
256 views

### Initial margin requirement as percentage, not dollar value

Problem from Finan, FM/2 On 12-30-1998, you decided to bet on the January effect. ON that day, you bought 400 shares of Microsoft on margin at the price of 139 per share. The initial margin ...
139 views

### Exact value of mean reversion rate knowing terminal value of the process

Let you have the following mean reverting process: $\text{d}x_{t}=a(\theta-x_{t})\text{d}t$, where the diffusion term is absent, that is this process is not stochastic. Let you know the value of ...
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1k views

### Can someone explain what “Exotics Trade Capture” capture means in layman's terms?

I am trying to find out what Exotics Trade Capture entails. I can't find anything on Google that isn't a job posting, which is where I saw this term. Say you did this for a living, how would you ...
883 views

### A gentle introduction to cointegration [duplicate]

Possible Duplicate: What is the intuition behind cointegration? Although having a postgrad degree in mathematics, I haven't used any maths 'in anger' for quite a few years now, so I am ...