# Tagged Questions

1answer
19 views

### Compound Interest - Initial Amount Borrowed [on hold]

Could someone explain how to calculate this question? Two loans of an equal amount were taken out at $10\%$ interest per annum for $3$ years and $4$ years respectively. The difference in the ...
0answers
47 views

### Solutions to exercises in Nelson's “An Introduction to Copulas”

I am paving my way through Nelson's "An Introduction to Copulas". The book has exercises (quite good actually), but no solutions. Does anybody have a solution manual for (some of those) exercises? ...
1answer
51 views

### How to find the expectation value?

Suppose that an insurer has an exponential utility function $u(x)=−2e^{-2x}$. What is the minimum premium $P^{-}$ to be asked for a risk X? After solving this we reached the following, So,only ...
2answers
55 views

### Expected value of SinhX

A random variable X is distributed according to a normal distribution with mean u and variance d.How to evaluate the expected value of SinhX?Thanks
0answers
35 views

### Stop-Loss reinsurance, Determine the premium?

I have a question regarding the stop-loss reinsurance and the detail of this question is given as follow,
1answer
43 views

### What is the minimum Premium to be asked for a risk X?

Suppose that an insurer has an exponential utility function $u(x) =-2e^{-2x}.$ What is the minimum premium $P^{-}$ to be asked for a risk X? I got some hint for this, but I could not understand ...
1answer
32 views

### How to calculate two asset portfolio (problem finding the Population correlation coefficient)

I have two assets: A has an expected value of $12$ % and a standard deviation of $8$%. B has an expected value of $15$ % and a standard deviation of $12$ %. Suppose that we invest $75$ % in A and ...
1answer
29 views

### finding the optimal decision value for two dependent random events.

I have been struggling with this problem regarding options (bermuda) for some time now. You can exercise this option on two seperate occasions namely at $T_1$ or $T_2$ with a strike price $E$. The ...
0answers
26 views

### How to sum correlation, or, calculate correlation of disjointed variables

I'm trying to calculate the correlation of 2 array of variables, but the array is disjointed in the middle - but I'm trying to obtain one correlation coefficient See the excel file I uploaded: ...
1answer
79 views

### financial maths - payoff options

Consider the payoff of a call option $C=\max\{0,S(1)-K\}$, where $S(1)=S(0)(1+\mu+\sigma_X)$, X has standard normal distribution. Take $S(0)=80$, $\mu=0.3$, $\sigma=0.4$, $K=100$ (strike price). ...
1answer
29 views

### statistics and financial ratios

Currently i am trying to derive the volatility of a financial ratio. I have calculated the volatility (standard deviation) of both the denominator and numerator however I am running into trouble ...
1answer
306 views

### Comparing annualised volatility from monthly and annual data

I fear there is a very simple answer to this question and its killing me that I can't see it. I am interested in calculating historical volatility: I have monthly index values starting in Jan 2005 ...
0answers
63 views

### Financial mathematic with Feynman-Kac

I have a really big task in financial mathematics and a small part of it (to set up the problem), I need to write a PIDE (the Feynman-kac) where we estimate options with jumps. It is derived from the ...
1answer
86 views

### When does variance fail to meet its purpose in mathematical statistics? [closed]

It have shown in a lot of both math and statistics book, however, When the books define the variance, it doesn't give much attention to math based theoretical background, i wonder if some formula that ...
1answer
261 views

### Normal Distribution Quantiles and Value at Risk

I'm preparing an exam, Quantitative Methods for Financial Markets. My book is not really clear for what concerns the calculation of normal distribution quantiles that have to be used in VaR's formula. ...
0answers
44 views

### Programming in R: How do I switch the X and Y axes?

I have a distribution plot of the daily drawdowns of the Dow Jones Industrial Average index; however, it has the drawdowns on the y-axis and the frequency on the x-axis... I'd like to switch that so ...
0answers
83 views

### Good reference on sample autocorrelation?

I'm not a statistician but I'm writing my thesis on mathematical finance and I think it would be neat to have a short section about independence of stock returns. I need to get better understanding ...
0answers
27 views

### Standard practice for identifying outlying spend amounts

Hope this is mathematical enough to qualify as a question - I'm no mathematician! I have a set of individuals travel & entertainment credit card spend, and I'd like to highlight any outliers that ...
1answer
6k views

### Average percent increase not equal to total percent increase?

I tried searching around for this but it was difficult to boil down the search terms. Plus nothing seemed to be showing up anyway. What's an easy way to show that the average percentage increase of n ...
1answer
552 views

### Statistics with overlapping periods

I've been having a lot of discussions about finance recently in which people will point to some results using overlapping time periods and claim a high degree of statistical significance. For ...
1answer
625 views

### What is the definition of a “predictable process”?

I am reading a book on financial mathematics, and frequently encounter the phrase "predictable process", which I haven't seen definition of, and cannot find the definition online. At first I thought ...