diff --git a/_posts/Debt-schedule-hack b/_posts/2024-11-29-Hacking-Debt-schedule-with-Lambda-in-Excel
similarity index 86%
rename from _posts/Debt-schedule-hack
rename to _posts/2024-11-29-Hacking-Debt-schedule-with-Lambda-in-Excel
index b147a4d1..b677a66d 100644
--- a/_posts/Debt-schedule-hack
+++ b/_posts/2024-11-29-Hacking-Debt-schedule-with-Lambda-in-Excel
@@ -11,6 +11,23 @@ tags: [template, return, portfolio, finance, diversification]
 How to use one single formula to hack Debt schedule with CashSweep
 
 
+
+Create a lambda function as below. 
+
+
+## Syntax
+DebtSchedule(
+  [OpenBalance] = Debt Open Balance
+  [CashBalance] = Cash Open Balance
+  [CFArray] = Cashflow Array
+  [MandatoryAmort] = Mandatory Amortisation
+  [CashSweep] = % of available cash after mandatory amortisation allocated to optional amortisation
+  [PIKInterest] = PIK Interest, applied to the opening balance instead of the average balance
+  [CashInterest] = Cash interest applied to the average balance
+) 
+
+# Activate Advanced Formula Environment
+Insert the following in your advanced formula environment. 
 ```typescript
 
 DebtSchedule = LAMBDA(