[R-sig-Finance] Automatic Download On All Symbols

[Neil Eastep]

Dumb question here --

If I want to evaluate and compare a statistic on the values of all
available US stocks -- how do I go about downloading the data
automatically?

I wonder if I could use have a list of stock symbols - and pass a
variable to yahooImport that iterates through the list of symbols . .
. does this make any sense?

I'd ideally like to pull in one year of daily (EOD) data on all stock
symbols that are optionable.

Any ideas?