# All Questions

1answer
103 views

### How to calculate Skulls Financial Turbulence for one asset?

I have just read this paper http://www.cfapubs.org/loi/doi/abs/10.2469/faj.v66.n5.3 In the paper they define financial turbulence formula as: Could anyone help me calculate/understand this ...
1answer
42 views

### need help with Donchian-channels function!

I want to be able to plot Donchian-channels. It's probably easier to use numpy but, am not that fluent with numpy yet so i thought i could make a function that takes two arrays as input(Highs and ...
3answers
322 views

### How do I calculate approximate equity liquidity?

I am a developer rather than a quant. I need to decide whether a given equity passes some basic liquidity threshold. It doesn't have to be precise, just good enough. I have a Bloomberg terminal data ...
1answer
50 views

### How to weigh many factors using a SMA/EMA

I'm learning about the SMA/EMA technical analysis, as well as, indicators such as Bollinger Bands, Stochastic Oscillators, MACD, etc. How do you know which one to use and which to weigh more over ...
1answer
61 views

### Investor choice problem

Guys I'm stuck with a problem... Consider the portfolio choice problem of a risk-averse individual with a strictly increasing utility function. There is a single risky asset, and a risk free asset. ...
0answers
47 views

0answers
57 views

### GARCH estimation does not work, error in my returns?

Hey everyone and I hope that there are some smarter people out here that can help me out with my problem...: I have trouble with my implementation of a GARCH(1,1) model and I do not know how to move ...
1answer
19 views

### Where do Over-allotment (Greenshoe) option shares come from?

I'm just wondering, if following an IPO the share price goes up and the underwriter calls the option, where do those extra 15% shares come from? Does the company have to issue more stock to cover the ...
1answer
99 views

### Option writing optimal sell time

When selling options, e.g. a straddle I read often the optimal time for selling options is 30-40 days until expiration. For me intuitively the optimal time would be around one week until expiration ...
0answers
46 views

### Return.portfolio error from PerformanceAnalytics package

When using the PerformanceAnalytics package of R, I am getting an error from the Return.portfolio function whenever I ask it to rebalance_on any frequency. If the rebalance parameter is removed, the ...
1answer
294 views

### Measuring momentum as AR(1) process

I would like to measure the momentum in the price of a stock from the time the market opens until the time I trade each day. I want to use this momentum number in post-trade analysis (regression of ...
1answer
220 views

### Realized Volatility vs. Standard deviation of log returns

I am interested in calculating high frequency 5-minute intraday volatility. I am going to use the standard Realized volatility which is the square root of the sum of squared log returns. Given X is ...
0answers
34 views

### optimal look back period for cointegration analysis on daily prices

I'm running some cointegration tests on 2 stock pairs and was wondering, generally speaking, what would be the optimal look back period to test considering I am using daily prices and the average ...
1answer
60 views

### Why does increased stock borrow costs decrease a stock's forward price?

The author in this article -- http://streetwiseprofessor.com/?p=7294 -- states that an increase in stock borrowing costs decreases a stock's forward price: In the absence of manipulation, the ...
0answers
55 views

### Financial theory

Ok guys, I'm studying from Danthine and Donaldson - Intermediate Financial Theory. The book itself doesn't have a lot of worked examples, and I'm lacking the basics for understanding some concepts ...

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