PER said: That really is not an acceptable choice. I've used Quicken for over 30 years and would expect some path to be able to handle this better.
1) If you haven't done so, I'd recommend the database maintenance procedure to copy, validate (the copy) and supervalidate (the copy) as described in part (2) of Troubleshooting 101 - Fixing Software Installation and Data File Problems
While running the Validate step, together with the Validate File option select the options to Rebuild investing lots and consider Correct investing price history. If you hold many securities long-term, you will have many daily price history records per security. This may contribute to slow performance due to the sheer number of records.
When done, work with the copied and validated file to see if performance improved.
2) Do make sure that there are no Placeholder transactions in any of your investment registers.
About Placeholders (Quicken Windows)
"N/A" in certain fields of an investment transaction indicates that you have Placeholder transactions in your account that need to be deleted and replaced with the correct Buy / Sell / etc. transaction that should have been recorded here. For more about Placeholders please go into Quicken Help (press the F1 key from anywhere in Quicken) and perform a Contents search for "placeholder". Alternatively or in addition to the above, read the first few articles found here: https://www.quicken.com/support/search/placeholder
3) If you're an active trader and your current investment account has many transactions pertaining to sold securities you may want to consider this:
Archive Investment Transactions
For about a year now, a new function has been available in Quicken, Archive Transactions. It will split your investment account register into two parts, leaving only those securities' transactions where you currently hold >0 shares in the active register. The rest is moved to a new Archive register within the current data file.
Having less transactions in your active register might improve performance.
Please read and carefully follow instructions here: https://www.quicken.com/support/how-archive-investment-transactions Eventually, after a couple of years, you might consider splitting your data file in two, with all the archived investment transactions in the old file and none remaining in the active file.
markus1957 said: You don't see this behavior in a spending account because Quicken has indexed the scroll function. It's been suggested for years that investment accounts should also be indexed to improve performance when scrolling thru the register table.adding- I did notice a substantial register scrolling improvement on my newer PC with an 8th generation i3 core and 13Gb Optane hybrid drive. The processor is low end so I'm attributing the performance boost to the SSD portion of the hard drive. My largest transaction count in an investment register is only about 6K; the lag is a transactions per register issue, not transactions per file.