Understanding initialization settings - II
Like in the previous chapter, you will use getSymbols() to obtain the SPY data from Yahoo! Finance.
After importing the data, use stock() to tell quantstrat what instruments will be present for the simulation, and to treat them just as they are, as opposed to creating a minimum buy size, as with futures. Furthermore, this command specifies which currency to use with the given instruments. Note that whenever you use a function to initialize a dataset such as GDX or SPY, you must enclose it in quotation marks:
stock("GDX", currency = "USD")
The quantstrat package has been loaded into your workspace, as well as the from and to date strings that you created in the previous exercise.
This exercise is part of the course
Financial Trading in R
Exercise instructions
- Use the
library()command to load thequantmodpackage. - Use
getSymbols()to get adjusted data from SPY from Yahoo! Finance between thefromandtodates. - Use the
stock()command to letquantstratknow you will be using the SPY data in your strategy and set its currency to"USD".
Hands-on interactive exercise
Have a go at this exercise by completing this sample code.
# Load the quantmod package
___
# Retrieve SPY from yahoo
getSymbols(___)
# Use stock() to initialize SPY and set currency to USD
stock(___)