Learning Center
Practical, exam-grade articles on financial calculation — TVM, bonds, capital budgeting, statistics and BA II Plus technique, bilingual.
Tools & Technique
Persian calendar finance: working with Jalali dates
The Solar Hijri calendar inside financial computation: leap-year rhythm, the 30-day Esfand, conversion workflows and why day counts and maturities shift across calendars.
7 min readUpdated November 17, 2025
Tools & Technique
Day-count conventions: ACT and 30/360 for dates and bonds
Ninety-two days or ninety? How ACT and 30/360 count time differently, why leap years matter, and how the dates worksheet bridges Gregorian and Jalali calendars.
7 min readUpdated October 1, 2025
Tools & Technique
Nominal vs effective rates: ICONV without surprises
Why a '12% loan' can grow your money by 12.36%, 12.55% or 12.68% a year — and how the ICONV worksheet converts nominal to effective and back in seconds.
7 min readUpdated September 15, 2025