Cleaning up stock price history file

You have a couple of options.

1.) Quicken will allow you to delete multiple price entries at once.

Investing > Security Detail View > (select security) > Update > Edit Price History

You can select multiple price "records" just as you would select multiple files in Windows Explorer, then click "Delete".

2.) You can get rid of all your current prices (rename your Quicken price history: QDATA.QPH, where QDATA is the name of your Quicken data), then re-acquire new prices ... from one of several sources.

You can use Quicken's "Download Historical Prices" to get historical prices for selected securities. "Quicken downloads daily prices of the selected securities for the most recent month, weekly prices for the 11 months prior to that, and monthly prices thereafter." This approach will only get prices up to five years old, and only for securities that Quicken is capable of downloading; bond prices, for example, can not be gotten this way.

You can go to other sources, such as Yahoo, and download historical prices into a comma delimited file, and "Import" that file into Quicken.

You can get the free application "QPH File Processor" (Google for it), which will take prices from any QPH file (It does not use Quicken and does not need any other member of the Quicken data "fileset") and create a comma delimited file of those prices. Between the QPH File Processor, your renamed Quicken price history file, and a word-processor/editor, you can select which securities and which prices you want to retain. [I personally would use the QPH File Processor to get my bond prices back ... and possibly to get prices older than 5 years for some securities.]