Kristoffer Fürst describes a second-generation IBOR that reconstructs positions by applying each day's transactions to yesterday's portfolio, making it independent from external accounting systems. The system doesn't need real-time completeness, just accuracy by period close.
Chapters
Second generation iBoard is actually quite similar to the first one, with the biggest difference in that it builds up the positions and cash from transactions itself. And it does so by using yesterday's view of the portfolio, applies everything that has happened since, and creates a new view today, which is then the current view of portfolios. So it's now independent of an accounting system or fund admin, which is the biggest benefit of the IBOR generation 2 compared to IBOR generation 1. In fact, often an IBOR generation 2 can be an accounting system, and to that end, it is usually complete. What I used to call it, I usually call it eventually complete. So a accounting system can't be missing things. It must have all of the information, so it must be complete. But it is in no rush to be complete. It needs to be complete by the time that we close the period.