Knowledge Journal

One article a day keeps the impostor syndrome away. Notes on Computer Science, Finance, Economics, and Mathematics.

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The Trading Floor Cheat Sheet - Every Asset Class Explained
Market Finance / Trading

The Trading Floor Cheat Sheet - Every Asset Class Explained

Rates, Forex, Repos, Derivatives... the complete map of what gets traded on Wall Street. From someone who actually sat on a trading floor.

2026-03-09 23 min readtradingasset classesforex
The Greeks - Delta, Gamma, Theta & Friends Demystified
Market Finance / Derivatives

The Greeks - Delta, Gamma, Theta & Friends Demystified

Delta, Gamma, Theta, Vega, Rho - they sound like a college fraternity, but they're actually the most important risk measures in options trading. Let's decode them all with real numbers.

2026-03-08 24 min readoptionsgreeksdelta
Sorting Algorithms Face-Off - From Bubble Sort to Quick Sort
Computer Science / Algorithms

Sorting Algorithms Face-Off - From Bubble Sort to Quick Sort

Seven sorting algorithms walk into a bar... and we benchmark all of them. Step-by-step visualizations, code, and a clear winner for every situation.

2026-03-07 24 min readSortingAlgorithmsBubble Sort
Statistics From Scratch - The Complete No-BS Guide
Mathematics / Statistics

Statistics From Scratch - The Complete No-BS Guide

Mean, median, standard deviation, hypothesis testing... everything you need to master statistics, explained like you're a smart human (not a textbook).

2026-03-07 31 min readstatisticsdescriptive statisticsprobability distributions
S.O.L.I.D. - The 5 Commandments of Clean C# Code
Computer Science / C#

S.O.L.I.D. - The 5 Commandments of Clean C# Code

Five principles that separate clean, maintainable C# code from spaghetti nightmares. With concrete examples of what NOT to do (and how to fix it).

2026-03-05 15 min readSOLIDC#OOP
The Singleton Pattern - 6 Ways to Do It in C# (And Which One Wins)
Computer Science / Design Patterns

The Singleton Pattern - 6 Ways to Do It in C# (And Which One Wins)

From the naive approach to Lazy<T>, we compare every Singleton implementation in C#. Spoiler: most of them have a fatal flaw.

2026-03-04 16 min readSingletonDesign PatternsC#
Probability Theory - From Coin Flips to Bayes' Theorem
Mathematics / Probability

Probability Theory - From Coin Flips to Bayes' Theorem

The complete probability course you wish you had in school. Permutations, distributions, Bayes - all explained with examples that actually make sense.

2026-03-03 36 min readprobabilitycombinatoricsBayes theorem
Central Banks Decoded - How the Fed and ECB Move the World
Economics / Monetary Policy

Central Banks Decoded - How the Fed and ECB Move the World

From interest rates to Quantitative Easing, understand how a few people in a room can make markets crash or soar. With real examples from 2008 to today.

2026-03-02 32 min readcentral banksmonetary policyFederal Reserve
Design Patterns 101 - Why the Gang of Four Changed Software Forever
Computer Science / Design Patterns

Design Patterns 101 - Why the Gang of Four Changed Software Forever

An introduction to the 23 design patterns that revolutionized how we write software. No code - just understanding what they are, why they exist, and when you need them.

2026-03-02 11 min readDesign PatternsGoFSoftware Architecture
Big O Notation - Why Your Code's Speed Actually Matters
Computer Science / Algorithms

Big O Notation - Why Your Code's Speed Actually Matters

A no-nonsense guide to algorithm complexity. From O(1) to O(n!), understand how your code scales - and why your interviewer keeps asking about it.

2026-02-28 21 min readBig OAlgorithm ComplexityTime Complexity
Bonds & Futures - The Backbone of Financial Markets
Market Finance / Fixed Income

Bonds & Futures - The Backbone of Financial Markets

From government bonds to futures contracts, understand the instruments that keep the financial world spinning. With real pricing examples and margin calls that'll make you sweat.

2026-02-28 28 min readbondsfuturesfixed-income
Calls & Puts Explained - Options Trading From Zero to Hero
Market Finance / Derivatives

Calls & Puts Explained - Options Trading From Zero to Hero

Everything you need to understand stock options, from what a Call is to building your first strategy. With real examples and payoff calculations you can actually follow.

2026-02-28 20 min readoptionscallsputs