diff --git a/README.md b/README.md
index ad8ee63..4370dd4 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,7 @@ of the contents:
 
 - `plan.md`: an overview of the general approach.
 - `register.xlsx`: a small spreadsheet to keep track of all transactions.
+- `register-worst-case-simulation.xlsx`: same spreadsheet as above, but pretending Operation Saylor started at the worst time: the top of the 2021 bull market.
 - `simulation`: stuff to simulate the operation saylor itself according to
   historical data. Was mainly used to make the decision of pulling the trigger,
   but it would be interesting to compare in the future how things went against