387a388,395
>         LocalDate previousStoredDate = null; 
>         
>         Optional<Pair<SecurityPrice, SecurityPrice>> previous = getLatestTwoSecurityPrices();
>         if (previous.isPresent())
>         {
>             previousStoredDate = previous.get().getRight().getDate();   
>         }
>          
399c407
<                 boolean doOverwrite = p.getDate().equals(last);
---
>                 boolean doOverwrite = (p.getDate().equals(last) || p.getDate().equals(previousStoredDate));