FinAcademy · by Marcin Dec

Finance, taught properly.
From first principles to Finite Differences.

Five levels and fifty-six lessons that you operate, not just read: every formula sits next to an interactive figure, every module ends in a timed test, and every lesson prints to a cheat sheet. Built from two decades of trading-floor practice and university teaching.

Access is by login. Your progress, test attempts and annotations follow your account.

56
interactive lessons
100+
figures you can drive, and download as PNG or Excel
5
timed module tests with full review
56
printable cheat sheets
90+
verified journal references

The curriculum

Each level assumes the ones before it. Start anywhere you can pass the test.

L1 · Foundations of Finance

Money and markets, time value of money, loan mathematics, NPV and IRR, money-market paper, bonds, FX, equities and CAPM.

Beginner 15 lessons

L2 · Managerial & Corporate Finance

Statements and ratios, break-even, DCF valuation and WACC with the Damodaran toolkit, ratings, cash management.

Intermediate 8 lessons

L3 · Financial Instruments in Practice

Day-count conventions on real dates, deposits and FRAs, interest rate swaps leg by leg, cross-currency, the 2008 crisis and benchmark reform.

Intermediate 8 lessons

L4 · Curves, Credit & Post-crisis Valuation

Bootstrapping, interpolation, Nelson-Siegel-Svensson, corporate credit spreads, CVA and collateral, multicurve pricing, PCA of the curve.

Advanced 15 lessons

L5 · Quant Miniatures

Binomial trees, Brownian motion and Ito, Black-Scholes and the delta hedge, finite differences and Monte Carlo, the vol smile, exotics, VaR and the order book.

Expert 10 lessons

How it flows

A linear path from a first savings account to pricing a barrier option. Nothing is used before it is built: forwards before swaps, discount factors before curves, Brownian motion before Black-Scholes.

Full lesson list visible after login.

Learn by moving the inputs yourself

Here is one control from Level 1, live on this page. Every lesson inside has figures like this one, plus scenario labs that replay 2008, the zero-rate decade and the 2022 hiking cycle.

Compound interest, the engine of everything

Drag the rate. The violet curve is compound growth of $10,000 over 30 years, the dashed line is simple interest on the same rate. The gap between them is interest earning interest.

Timed module tests

Twenty questions drawn from a bank, thirty minutes on the clock, instant marking, and a review that explains every miss and links back to the lesson that teaches it.

Cheat sheets & downloads

Every lesson prints to a one-page formula sheet. Every figure exports as a publication-ready PNG with your parameter settings, or as an Excel workbook with the underlying data.

Grounded in the literature

Each lesson closes with the research that built it, from Markowitz and Merton to post-crisis multicurve papers. Every reference is DOI-verified. Nothing is hand-waved.

The author

MD

Marcin Dec, PhD

Assistant Professor in Finance, Department of Finance, Kozminski University, Warsaw

Research
Research Assistant at FAME|GRAPE since 2019. Term-structure modelling and the estimation of term premia, work that the advanced lessons of this course draw on directly.
Practice
Twenty-plus years of fixed-income practitioner experience as senior analyst, portfolio manager and risk manager before entering academia, plus professional training for central-bank, regulatory and treasury audiences.
Education
PhD in Quantitative Economics, SGH Warsaw School of Economics.
MSc in Mathematical Finance, University of Oxford.
Certifications
FRM, PRM, CIIA, CQF, RAI  ·  financial risk management (FRM, PRM), international investment analysis (CIIA), quantitative finance (CQF) and risk in AI (RAI).

The interactive figures on this site are the way he always wanted to teach: the student turns the dials, the market logic does the rest.

Ready to start?

Log in to enter Level 1, or jump straight to the module test of any level you think you already know.

Enter the academy