st: Overlapping-roling five-day returns

["Rodriguez, Dan (FIRMMKTRSK)" <Dan.Rodriguez@morganstanley.com>]

I am constructing a simulation of weekly returns from a four year
history of realized returns, which includes 209 individual weeks of
data. Is there a command in Stata that will allow me to quickly
construct overlapping rolling five-day sequential returns from this
data?
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