# All Questions

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### Applicability of PCA to get historical volatilities to calibrate interest rates trees

My question in short is as follows: can I take main principal component of historical covariance matrix and use it as historical volatilities when fitting a binomial tree? Here's more detailed ...
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### Local volatility parametrization using the spot

Is it possible to estimate the local volatility using the spot price S at time t instead of the strike price K and the expiry date T ? Any help would be appreciated.
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### Unique risk neutral measure for Brownian Motion

For a standard geometric Brownian motion model of stock prices: $$dS = a S dt + \sigma S dZ$$ we can transform the process to be under risk neutral measure: $$dS = r S dt + \sigma S d \tilde{Z}$$ ...
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### Bridgewater's Daily Observations

Bridgewater Associates send out Daily Observations to their clients, but I haven't found many traces of these publications online. The series started some 40 years ago by Ray Dalio, and there're just ...
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### Seasonal patterns in financial markets (weekday effects)

What seasonal patterns are there in financial markets? Is my feeling "true" that Mondays are more volatile than e.g. Tuesdays (as information gathered during the weekend can only be turned into an ...
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### Does heteroskedasticity of returns depend on the time frame?

Similarly to my last question, for which I obtained very interesting and useful answers, I would like to know if there has been any study regarding heteroskedasticity and time-frames of the returns. ...
298 views

### Calculating Greeks using BinomialTree in Matlab [closed]

section 1. Calculating sensitivity of the price of derivatives American or European option using binomial tree model section 2. Calculating first order greeks the code compiles till this point ...
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### Measuring Volatility from Execution Prices

I was told of a way of measuring the volatility of a stock by looking at the reported execution prices (from Level III or Level II data.) I'm well aware of how to measure volatility by looking at the ...
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### Extracting Signal from Noisy Data

Consider a scenario in which Y_t represents the % change in price and we want to use X_t to predict Y_t. We assume that X_t is information we get before Y_t is revealed. Suppose that in reality Y_t ...
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### Price of an American call option [closed]

I'm working through revision questions at the moment and we are asked to compute the price of an American call option. Suppose that $dS_t = \sigma S_t dW^*_t, S_0 >0$ Let $0<U<T$ be fixed ...
491 views

### Sharpe ratio and leverage

Does leverage affect the Sharpe ratio? If my Sharpe is 2 at no leverage goes it change, fall by half say, at no leverage?
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### how does a bond maturing affect the pricing of the corresponding CDS?

if a bond matures, and there is no other existing bond from the legal entity that has not matured. Then how does that affect the CDS that corresponds to that bond?
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### Suppose you bought a July ITM call and sold an August ATM put, am I net long or short?

Here is the full question, even though ive broken it down to the mini question above. Suppose you have bought a July ITM call and sold an August ATM put. What would be your delta in this position? ...
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### Is there a relation between these two forecasting/estimation approaches?

When learning econometrics I have usually seen stuff from the following perspective: Assume $Y_t = f(X_t) + e_t$, where f is some function of $X_t$ (typically linear). For example, assume \$Y_t = X_t ...
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### Reference Request: Horse Race for Portfolio Allocation

Probably the most popular horse race study for portfolio strategies is Optimal versus Naive Diversification: How Inefficient Is the 1/N Portfolio Strategy?, with DeMiguel, L. Garlappi and R. ...
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### Kenneth R. French data base on momentum and size: construction and how to use it concretely with momentum only

So, you can find all the data bases on this site. More explicitly, I would like to take the "Developed Market Factors and Returns" part. Even more explicitly, let us take the "25 Portfolios Formed on ...