# All Questions

1answer
6 views

### Source of market or security attribute information?

There are many securities and exchanges on platforms like Bloomberg and Quandl, but many securities are described with the relevant pit close times and pit open times, exchanges, related futures, and ...
1answer
41 views

### Performance of Open Source Time Series Database for Financial Market Data

We would like to store financial tick data in a database (potentially billions of rows) and then create aggregated (open-high-low-close) bar data from it (e.g. 1min or 5min bars). It was mentioned ...
1answer
15 views

### What is the correlation of stock options?

I want to calculate the VaR of two correlated option positions, and I know the correlation between stock price returns. I want to separately calculate $Var_1$,$Var_2$ for option 1 and 2, and then use ...
3answers
83 views
+50

### Sources of index data (MSCI, FTSE, S&P etc.)?

Who are the major suppliers of index data that cover multiple index providers, e.g. MSCI, FTSE, S&P etc? There are a huge number of people sourcing e.g. equity data, but index data is much harder ...
1answer
18 views

### Gamma Imbalance Explanation

Can someone please give me an explanation as to what put-call gamma imbalance specifically refers to (imbalance of what?), and why they may exacerbate volatility from a market perspective, and why the ...
1answer
41 views

### Can a large OpenInt of calls cause a stock to go down?

I read forum post from another site. Which stated... ...
1answer
14 views

### Utility Theory - Certainty equivalent approximation formula derivation

I have a question on an exercise from chapter 9 of D. Luenberger, Investment Science, International Edition, where I suspect there may be a typo. Exercise 8 (Certainty approximation) There ...
1answer
1k views

### Historical volatility from close prices (Haug pg 166)

I have implemented a function for calculating historical volatility using close the close method as described by Haug on page 166. When I implemented the formula given by Haug, it resulted in some ...
2answers
29 views

### Why QuantLib computes the fixed-leg NPV by this formula?

I'm trying to understand how QuantLib creates (bootstraps) a yield curve from a vanilla swap at the source level. I have the following test code: ...
1answer
34 views

### How to show that this exponential utility function is wealth-independent?

I have a question on the following exercise from chapter 9 of D. Luenberger, Investment Science, International Edition. Exercise 2 (Wealth Independence) Suppose an investor has exponential ...
1answer
64 views

### Matlab Portfolio Optimization with bid ask spread

I'm trying to find the optimal portfolio of options and stock which minimizes the standard deviation of the portfolio returns but also taking into consideration the bid and ask prices of the assets. ...
1answer
49 views

### Extracting Default probability from a single CDS

I have to find the CDS's default probability using the simplest Poisson Process (intensity constant). I'm wondering how to get this estimate if I have only a CDS with maturity 5years. If I had ...
1answer
74 views

### Difference between Sharpe Ratio and Information Ratio

I am finding it difficult to understand the difference between the sharpe ratio and the information ratio and the relationship between the two, and cannot find a decent reference that breaks it down ...
1answer
32 views

### What is this ratio: expected returns on stock divided by risk free rate?

So this ratio has come up in some work I'm doing and I can't seem to figure out if it is attested in the literature. Here's the setting: Given a risk free rate $r(t)$ and a stock price which follows ...
1answer
25 views

### Why the negative sign in modified duration relationship

If $P$ is price, $D$ modified duration and $y$ yield then we have the relationship, $$dP=-D \cdot P \cdot dy$$ Why is there a minus sign and what does correspond to?
1answer
13 views

### Modeling credit utilization and stock market growth

I relatively new to financial mathematics but I am wondering if at all there exists a relationship between credit utilization (the rate at which the public accesses credit from financial institutions) ...
1answer
47 views

0answers
16 views

### How to pull and/or calculate implied volatility of an ATM Call as its quoted everyday in Python? [on hold]

Set of tasks: Pull quote for option with terms T = 1, S = K Calculate Implied Volatility of this option Plot datapoints Thank you folks!
0answers
29 views

### Bloomberg implied volatility smile for equities

I was wondering if someone knows how Bloomberg does their computations for the implied volatility smile for equities. As far as I understand, they use a lognormal mixture to model the stock prices. ...
2answers
136 views

### Calculating VaR with Monte Carlo simulation

I would like some help here :) I have a problem calculating VaR with the Monte Carlo Simulation. I have followed then next steps, is this a right way to calculate VaR or I need something more? ...
1answer
377 views

### Do futures have predictive value?

Futures closely mirror their underlying, as can be seen in the charts below. Eventually, at expiration, they reach the value of the underlying. However, they seem to show no extra information about ...
6answers
1k views

### George Soros models

Mr. Soros in his books talked about principles which are not used by today's financial mathematics — namely reflexivity of all actions on the market. Simply it can be given by following: ...
1answer
103 views

### How to create a basket of currency pairs with the lowest correlation in R?

My strategy is designed to buy and sell all assets of a universe and rebalance periodically. It goes either long or short. To limit risk exposure to a single currency I would like the assets in the ...
0answers
19 views

### labeling high frequency signal data

Was curious if anyone has methodologies they can recommend for systematically labeling (discrete) signals generated from intraday tick data for use in classification or detection models ?
2answers
205 views

### Quantitative Finance Programming Language

Since couple of weeks, I started to do my research on quant finance. During this time, I could discover a lot of stuff and with that stuff, a lot of questions came to my mind. A lot of news or ...
0answers
13 views

### Simulate stock prices following t distribution in matlab [on hold]

Trying to simulate different price paths for a stock following the t distribution. Can anyone provide code?
0answers
12 views

### number of trades - flaw in White Reality Check?

I went through Whites paper of the reality check for multiple strategy testing. To summarize at a simple example: I have 2 strategies, s1 and s2. s1 gives 2 signals and therefore 2 returns, s2 gives ...
1answer
98 views

### Forecasting using GARCH in R

I am using the predict and ugarchforecast functions in R. When I fit my models and try to forecast, I get either only increasing or decreasing values for sigma, does anyone know why? Thank you ...
12answers
9k views

### How fast is QuickFix ?

In my firm we are beginning a new OMS (Order Management System) project and there is a debate whether we use Quickfix or we go for a professional fix engine? Because there is a common doubt that ...
1answer
22 views

### Isolating single assets standard deviation in a portfolio accounting for correlation

I am running a simple Monte Carlo analysis in Excel using mean return, standard deviation and the =NORMINV(RAND(),mean,std dev) method. I have a correlation matrix that I use to compute the portfolio ...
1answer
26 views

### Full Kelly portfolios having same weights as tangency portfolios

I'm currently comparing empirically the differences between Markowitz and Kelly portfolios. I calculated the Kelly weights for monthly return observations over 10 years for a sample of 50 stocks from ...
1answer
42 views

### Likelihood of a caplet ending in the money

with what likelihood would one expect an ATM caplet to end up in the money? Just as a very rough guess, from real world experience. When I consider N(d2) from the Black formula, for spot = strike = ...
0answers
35 views

### How to calculate yield spread?

I came across this multiple choice question on yield spread and I can't understand why the reasoning for the selected answer is correct.Can you confirm or clarify ? ( emphasis in the text is mine) ...
1answer
45 views

### Given cash flows, what is the interest rate of the following contract? [on hold]

I am presented with an investment opportunity where I am given #481,000 on day 1. Thereafter, every 10 days, I am required to give back #50,000 every for 100 days (10 * 50000 = 500000). How do I ...
1answer
26 views

### CDS spread sensitivity pattern

From pag. 27, Table 6: http://www.opengamma.com/sites/default/files/pricing-and-risk-management-credit-default-swaps-opengamma.pdf Why do sensitivities of CDS are slightly negative before the ...

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