update_instruments.iShares: update iShares and SPDR ETF metadata
In gsee/FinancialInstrument: Financial Instrument Model Infrastructure for R

Description Usage Arguments Value Note Author(s) References See Also Examples

This will update previously defined iShares or SPDR ETF instruments. Both functions will add attributes for “Name”, and “FundFamily” (“iShares” or “SPDR”). update_instruments.iShares will also add an attribute for “MgmtFees”

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update_instruments.iShares(Symbols, silent = FALSE)

update_instruments.SPDR(Symbols, silent = FALSE)

`Symbols`	character vector of iShares ETF ticker symbols. If not specified, `unique(c(ls_funds(), ls_stocks()))` will be used.
`silent`	silence the warning that no iShares are defined?

called for side-effect

update_instruments.SPDR will probably NOT work on Windows because in the call to download.file it uses method=curl since it has to download from an https URL scheme.

Garrett See

http://us.ishares.com/home.htm, https://www.spdrs.com/

update_instruments.yahoo, update_instruments.TTR, twsInstrument:::update_instruments.IB, update_instruments.instrument, update_instruments.morningstar, update_instruments.masterDATA

## Not run: 
stock("IWC", currency("USD"))
update_instruments.iShares("IWC")
getInstrument("IWC")

Symbols <- stock(c("SPY", "JNK"), currency("USD"))
update_instruments.SPDR(Symbols)
buildHierarchy(c("SPY", "JNK"), "Name")

## End(Not run)