Well, the red x on the icon does not with appear with all financial websites. For example, if I logon to my banking website, the lock icon is next to the address in the web address box but it does not have a red x on it. If I click on the lock icon, I get a popup box similar to one in my previous post but all three sections (Identity, Connection, and View history) of that Security Information popup panel have a green box, with a check inside, under them.
With the panel that appeared from Lowe's (in my previous post), the Connection section warns that "this page includes other resources which are not secure". So, that's what caused the red x to appear on the lock icon with the Lowes website. This explains why I haven't see it before; I had not used Chrome to logon to the Lowes account before that instance.