update_instruments.yahoo: updates instrument metadata with data from yahoo
In redmode/FinancialInstrument: Financial Instrument Model Infrastructure for R

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

Adds/updates information in instrument with data downloaded from yahoo

  update_instruments.yahoo(Symbols = c("stocks", "all"),
    verbose = FALSE)

  update_instruments.TTR(Symbols = c("stocks", "all"),
    exchange = c("AMEX", "NASDAQ", "NYSE"), silent = FALSE)

`Symbols`	can be a vector of instrument names, or, can be ‘all’ or ‘stocks’ or, for update_instruments.TTR, can be NULL in which case all stocks found with `stockSymbols` will be defined
`exchange`	character vector of names of exchanges. Used in ‘TTR’ method. Can be “AMEX”, “NASDAQ”, or “NYSE”
`verbose`	be verbose?
`silent`	silence warnings?

Although these functions are intended to update the metadata of previously defined instruments, update_instruments.TTR will define the stocks if they do not already exist.

update_instruments.TTR is only to be used on U.S. stocks denominated in USD.

called for side-effect

Garrett See

Yahoo! Finance finance.yahoo.com YahooQuote http://dirk.eddelbuettel.com/code/yahooquote.html gummy-stuff.org www.gummy-stuff.org/Yahoo-data.htm

update_instruments.instrument, update_instruments.morningstar, update_instruments.masterDATA, stockSymbols, stock

## Not run: 
	stock('GS',currency('USD'))
 update_instruments.yahoo('GS')
	getInstrument('GS')
 update_instruments.TTR('GS')
 getInstrument('GS')

## End(Not run)