# All Questions

238 views

### Risk neutral drift vs real world

I was of the understanding that risk neutral drift was always the risk free rate. A section from Gregory's book on Credit Value Adjustment seems to say risk neutral drifts are typically estimated from ...
106 views

### Why the value of this portfolio is negative? [closed]

Let's assume I buy 1 call with strike 100 and 1 call with strike 120 I sell 2 calls with strike 110 (with same expiration) I wonder why value of this portfolio is negative at $t=0$?
116 views

### Does it make sense to calculate Fama-French betas of a single stock?

Or should Fama-French only be applied to portfolios?
213 views

### Volatility smile risk (negative effect) on dynamically hedged portfolio?

About last week you can see MSFT call & put option appears to be resembling volatility smile. And then I open trade positions on a 4 MSFT long call option contract (all 4 contract with fixed/...
86 views

### Why is my Euler discretization error increasing with number of steps?

I'm trying to see how the Euler discretization error behaves with respect to the number of steps. To do this I'm simulating a geometric brownian motion and comparing it with it's 'exact' solution. ...
67 views

### Is it OK to consider the expected return is zero for stocks when calculating VaR over a short horizon?

I want to implement the approach described in the following recipe for calculating VaR: Is there a step-by-step guide for calculating portfolio VaR using monte carlo simulations I was told that I can ...
87 views

71 views

### Will rolling-down-yield-curve bond strategy work if interest rates remain unchanged?

Suppose I have 2 strategies; A) Buying A One Year Bond And Holding To Maturity (Buy & Hold To Maturity) B) Buying A 3 Year Bond and Selling After One Year (Rolling Down The Yield Curve) Assume ...
63 views

### Why some exchanges enforce that you send the total quantity (fill qty + open qty) when changing the order size?

Is it to protect against overfills? Can anyone explain in simple terms?
80 views

### Trying to understand the sign of Theta

I guess this a pretty easy question to answer, but I'm not able to get the intuition despite reading the concept a couple of times. So, the Greek Theta is almost always negative, except for when an ...
78 views

### Portfolio insurance strategy with path dependence

I have the following problem. Let us assume that $S_t$, the stock price follows, geometric Brownian moation with parameters $(\mu,\sigma^2)$. We are given an amount of money $M$ and at each point in ...
138 views

I have been reading online about the FX carry trade and how this can be profitable (in general). From my understanding, the idea is to be long (lend) the currency with higher interest rate and short (...
49 views

66 views

### Where am I making a mistake in my calculation of profit on a short-sale?

I am studying financial math and here is a problem and the solution from the author: Here are my calculations: The short sale is $200\cdot24.82 = 4964$. Now half of this amount will be taken for a ...
25 views

### free and reliable stock ticker API [duplicate]

I am looking for an API that will give me (somewhat real time) stock quotes for free for a website. I have heard about using yahoo finance URL download but (to the best of my knowledge) yahoo could ...
49 views

### Why can't we use Finite Differences with non-parabolic PDEs?

The title of the question says it all. Why can we only apply the method to parabolic PDEs like the heat equation, and not to ordinary PDEs?
94 views

### CallableFloatingRateBond in QuantLib: just a matter of multiple inheritance?

I would like to know what are the issues related to a possible CallableFloatingRateBond class in QuantLib and to have some hints on implementation. My (very ...
48 views

### Why does the credit exposure of a forward increase with time

According to Gregory, the most obvious driving force behind credit exposure is future uncertainty. He characterizes the credit exposure of a forward contract as increasing with time; where exposure is ...