# Tagged Questions

The tag has no usage guidance.

83 views

### Valuing derivatives under stochastic interest rates

I would like to price a European option with maturity equals to 5 years. To do this, I'm using the Black-Scholes model with stochastic interest rates. Suppose I choose the CIR model for the risk-...
29 views

### Why is the Risk Free Rate 1 over Contingent Claim Prices?

Reading Asset Pricing by John Cochrane (2005), in his second chapter he defines the risk free rate as: Rf = 1 / sum [pc(s)] Where pc(s) are state contingent claims, where s is the state of nature ...
28 views

### Convert 90-Day Tbill to risk free rate on continuous basis

I am trying to use the BS formula to compute the value of a call option. To do that I need the risk free rate on a continuous basis. As far as I know, people typically use the 90 day TBill as a proxy ...
67 views

### Calculate excess returns for Sharpe Ratio with today's or past risk free rate of return?

I am struggling with the calculation of the Sharpe ratio. I am wondering whether to calculate the daily excess returns with today's risk free rate of return or the risk free rates corresponding to the ...
65 views

### Why is a risk-free portfolio desirable?

I am in the process of creating a program that generates status-quo variance-free portfolio (at least theoretically), and my question is pretty fundamental, which may just mean dumb. I am sorry if ...
93 views

### How to calculate weight of two stocks without knowing their correlation?

I have difficulty to solve attached question. The question asks me to find new weight of stocks by just changing standard deviation of the portfolio. I really do not have any idea how to solve it. ...
99 views

### Risk free rate proxy

Why is the US 30 day t bill traditionally used as a risk free rate instead of Euro bonds for example? They are both not going to default surely?
61 views

### Logic between options and risk free rate [closed]

What is the relationship between put option price and risk free rate? And between call options price and risk free rate? Explain the logic? No calculation.
40 views

### How should I use central banks rates in order to compute 2-day forward exchange rate on EURUSD

Good morning, I would like to compute a 2-day forward exchange rate on EURUSD. For that, I have historical data on EURUSD spot price, and I know that theoretically, when maturity is T we have : $F_0$...
660 views

### Which risk free rate is assumed by market when pricing american options?

I'm just started with finance, so maybe my question is dumb or answered elsewhere. Please guide me to relevant materials. According to put-call parity more time to expiration means more difference ...