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Quantitative Finance : Recent Questions and Answers (Page 8)

Find answers to your questions about Quantitative Finance or help others by answering their Quantitative Finance questions.

Oil price model calibration with Kalman Filter and MLE in python

I am trying to calibrate a one-factor mean-reverting process in python 3. The process is defined as: begin{equation}dX = k(alpha - X)dt + sigma dW,end{equation} where...

Asked on 10/27/2021 by gte

2 answer

Limit of conditional expectations (when limit linked to the conditionning)

I am working with conditional expectations and am trying to derive a limit property. Consider $(Y_n)_{n in mathbb{N}}$ a sequence of square integrable random variables, that converge in ...

Asked on 10/27/2021

0 answer

Non-Linear Time-Dependent Volatility

My data consist of monthly electricity futures contracts. Unlike other commodities, electricity is delivered throughout a month (rather than on a specific date), which means that, as the active month...

Asked on 10/27/2021

0 answer

Fama: Efficient Capital Markets: A Review of Theory and Empirical Work - are martingales incorrect?

In his paper, Eugene Fama gives the definition of a "fair game" as given below. I disagree. AFAIK, a martingale has the following property: $E[X_{t+tau} | X_t] = X_t$....

Asked on 10/27/2021 by s5s

1 answer

How to calibrate models with unbounded parameter space

I am calibrating the Heston model with sequential quadratic programming algorithm. It turns out that the volatility surfaces I am calibrating to can be fit very well with extreme values...

Asked on 10/27/2021 by starovoitovs

1 answer

Solution for a SDE for a Bond found in Bugard & Kjaer

I'm going over the paper -Partial Differential Equation Representation of Derivatives with Bilateral Counterparty Risk and Funding Costs- from Burgard and Kjaer. There the following SDE is given...

Asked on 10/27/2021 by CA-Quant

2 answer

Intuition for Martingale Representation Theorem

Can you please explain Martingale Representation Theorem in a non-technical way that what is it and why is it required? Most of the stuffs I studied so far are quite...

Asked on 10/27/2021

2 answer

Why Bloomberg USD swap curve (YCSW0023 Index) changes last month?? and why put a Financial commodity future into this curve?

The Bloomberg USD swap curve (YCSW0023 Index) had changed and bloomberg put a Financial commodity future. Why changes? What the factor make this changes? Why bloomberg put into a financial...

Asked on 10/27/2021 by jonas.lima

1 answer

Options when there's no VolSurf - Emerging/Frontier Markets

Context: Most emerging/frontier markets have no or very thinly traded volatility surfaces for their equity markets (single name and indices alike), furthermore, they usually have restrictions on Short-Selling and Capital...

Asked on 10/27/2021 by Mercadian

1 answer

Are heuristic portfolios efficient portfolios?

Markowitz's definition of an efficient portfolio is one that minimizes portfolio risk for a given level of expected return. He therefore calls portfolios along the efficient frontier "frontier portfolios" as...

Asked on 10/27/2021

0 answer

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