Learning Center
Practical, exam-grade articles on financial calculation — TVM, bonds, capital budgeting, statistics and BA II Plus technique, bilingual.
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.
Statistics for finance: mean, standard deviation and regression on the BA II Plus
One-variable and two-variable statistics done right: sample versus population dispersion, correlation, R², and forecasting in both directions with a verified worked example.
BA II Plus technique for CFA Level I quantitative methods
Exam-day workflow: TVM sign discipline, NPV/IRR keystrokes, statistics and regression worksheets, ICONV traps and the settings that quietly ruin otherwise perfect answers.
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.
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.
Depreciation methods: SLN, SYD, declining balance and units of production
Four ways to expense one asset — straight-line, sum-of-years-digits, declining balance and units of production — worked on the same 10,000/1,000/5 asset.
MIRR, payback and profitability index in practice
Beyond the NPV/IRR duo: how a finance-reinvestment MIRR fixes the reinvestment flaw, what discounted payback really measures, and why PI is NPV in disguise.
NPV vs IRR: choosing projects that create value
The two capital-budgeting workhorses, their decision rules, a fully worked 198.21 / 19.09% example, and the sign-change trap that breaks IRR.
YTM, current yield and duration explained
Three numbers that describe a bond's return and risk: the full-roundtrip YTM, the snapshot current yield, and duration as the measure of interest-rate risk.
Bond pricing: coupons, discounts and premiums
How a bond's price is built from discounted cash flows, why price and yield sit on a seesaw, and how clean, dirty prices and accrued interest fit together.
Loan payments and amortization schedules step by step
Compute a mortgage payment, read the interest-versus-principal split, and use the P1/P2 amortization windows like a professional — with a fully worked 100,000 loan example.
Time Value of Money: the engine behind every financial decision
Why a rial today outweighs a rial next year, how the five TVM registers work, and the sign discipline that makes every calculator answer come out right.