I would like to know the fastest way to find the earliest listing date of a given symbol on the New York Stock Exchange - for example,
FinancialData["AAPL", All][[1,1]]
returns
{1980,12,12}
Which is correct, since AAPL was first listed on the NYSE on 1980/12/12.
This method is extremely slow, however, given one has to get the entire time series for a company in order to access its first element. Is there a faster way to do this?