Despite our best efforts, sometimes outlying data points get into our database. If you spot a suspicious looking quote, please report it to us using our Feedback form and we'll investigate. In the form, please include a link to the chart in question and a description of what you are seeing on the chart. Please keep the following things in mind when reporting bad data:

1. Check to see if other web data sources have the same bad information. We've found that the data at Yahoo Finance is pretty accurate and the first thing we usually do whenever we receive a bad data report is to compare our data to Yahoo's. If our numbers match Yahoo's, then we will need more documentation from you about why you think the change should be made.
2. We adjust our historical data to account for splits and distributions. We've written several articles about why we do this. Check our Data Adjustments page to see if this symbol has recently undergone a split or distribution before reporting the problem.
3. We usually do not change outlying data points on our intraday charts since we do not have an independent source to compare things to. It is not uncommon for intraday charts to contain points that are outside of a stock's daily quote range. The daily quote range is audited by the exchanges after the close and may be updated later as part of that audit process. Intraday data is not audited in that way.
4. Daily quotes are not "official" until after 6:30PM Eastern due to the auditing process mentioned above. You should wait until after then to report issues with today's quotes.