1
vote
1answer
46 views

Do query services like Google Finance and Yahoo Finance go back to correct busted and adjusted trades?

Do query services like Google Finance and Yahoo Finance go back to correct busted and adjusted trades? In other words, should I re-download yesterday's data if I want to be sure my intraday data ...
9
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3answers
6k views

Data source for historical intra-day bid/ask price data for stocks?

Is there any place to get historical intra-day bid/ask data for stocks? (i.e. pricing information for throughout the trading day, rather than end-of-day prices only?) Does anyone even keep this data ...