I am using Quicken for Mac 2017 ver4.5.1 This is the US version. The problem just started two days prior, so 4/27/2017 and 4/28/2017 had zeros in the securities price history entry. One example was the Vanguard Institutional 500 Trust. One thing that stands out is the funds do not have symbols but that was not a problem prior to 4/27/2017. I use Quicken Direct to synchronize my account, possible the funds closing price is updated via my account vs the getting the values using the symbol.
I started having the same problem a few days ago. Am using Windows 10, Quicken 2016 Premier, R17.4. Quicken was downloading security prices for Vanguard funds that are in a 401k but are not publicly traded. Now Quicken shows no price (dropping the value of the accounts).Any help would be appreciated. Thx.