Nasdaq Prices Why Can We Not Find The Historic Prices Of Dow Jones, Nasdaq, QQQQ And S&P 500 At Present?

Why can we not find the historic prices of Dow Jones, Nasdaq, QQQQ and S&P 500 at present? - nasdaq prices

We can use the historical prices for Dow Jones, Nasdaq, QQQQ and S & P provide for 500 days, but now we can not. I hope that Yahoo could give an answer on this point because they depend on for my daily trading activities. If Yhaoo not offer this service, you could recommend to other sites about it? Thank you very much.