# Questions tagged [time]

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19 questions
72 views

### How to calculate RSI while considering market close and holidays?

I was trying to calculate RSI over hourly OHLC bars for a symbol (AAPL as an example) and got stock, first how should I handle closing hours? (does it make sense to ignore them all together and assume ...
41 views

### Prove that the value of a perpetual American put is time-independent

I know that the value of a perpetual American put is time-independent. I think it is very intuitive property and it results from the fact that we do not have any expiry date. My question is: Is it ...
120 views

### In Linear Regression for time series stock prediction, instead of cost function, use final portfolio value?

In Linear Regression for time series stock prediction, instead of using the cost function and minimizing the cost function, why can't we use the final portfolio value? Assume we are doing a time ...
922 views

### Historical beta: Beta estimation for which time horizon?

In practice historical beta is the most used approach for calculating beta. Some one can use i.e. the last 6 month daily returns of stock i and market m to calculcate this. Nevertheless I am ...
85 views

### How to calculate the elapsed time until a stock reach a certain price?

In specific, I will set a certain price to a stock and I want to know how long takes until the historical prices reach this price. Thanks you.
937 views

### How to calculate the initial payment of a graduated payment mortgage (GPM). Real estate Mortgage analysis

My professor used this: 12%, monthly-pmt, 30-yr GPM with 4 annual step- ups of 7.5% each, then constant after year 4: L=PMT \left[ PV(0.01,12,1) + \frac{1.075}{1.01^{12}}PV(0.01,12,1) + \frac{1....
349 views

### Strategies to merge bid, offer and trade price time series into a single price time series?

I'm doing intraday analysis on low volume stocks. There are just a few trades every day, but a whole host of bids and offers. In order to reduce the sparsity of the time series data I'd like to ...
300 views

### Ideas for speeding up greek calculations

My current calculations using the vollib library averages 0.5 seconds. Is there any way to get it faster? Any tips/best practice notes will be helpful. This is for a scripting language such as python....
436 views

### Estimation of annualized volatility depending on data frequency - exceptions to the general rule?

From my understanding, the annualized standard deviation of daily returns is generally higher than of annualized standard deviation of weekly returns is generally higher than.... monthly...quarterly......
109 views

### Estimating volatility from high frequency price volume data of multiple stocks

I have price volume data of five stocks, sampled at 1 minute interval for six months. The data is quite noisy, lots of missing data and also some weired spikes. Can someone suggest me how to clean ...
73 views

### How can the time value portion of an option be higher than 100%?

Here's a screenshot from InteractiveBrokers TWS for the near-the-money put and call on the ES Dec '15 Future: The absolute value of the time value, 9.50, makes sense. But why is the percentage value ...
751 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 ...
132 views

### I have volatility of a portfolio in year 1 and in year 2. How do I calculate the volatility over the total 2-year period?

thanks for looking into this question. See the picture below (better is right-mousebutton - open in new tab). I also have the price and return data of the Stocks if that's needed to calculate the ...
92 views

### I have portfolio volatility for year 1 and for year 2. What is portfolio volatility for year 1 and 2 combined?

Thanks for looking into this question. Portfolio volatility in year 1 = 15%. Portfolio volatility in year 2 = 20%. What is the portfolio volatility over the timespan year 1 and 2 combined? Is it ...
107 views

### How to calculate burnrate?

Wikipedia says Burn rate is a synonymous term for negative cash flow but I neither agree nor believe that is formalized. A company could need turnaround from losses ...
700 views

### Forex trades: what time zone are trade and value dates specified in?

When receiving a value date of D from the counterparty for a trade in NZD/USD, is D assumed to be date D in Auckland date D in New York date D in UTC date D in some arbitrary time zone ? There are ...
155 views

### How does one use the Johansen cointegration test in a linear time series model?

How does one use the Johansen cointegration test in a linear time series model? Should I only use normalized coeffients for interpretation? Or, once I know that the variables are cointegrated, do I ...