Steffen Fonvig

Founder & CEO, Fonvig Group

AI Stock ScreeningMachine Learning for FinanceTechnical AnalysisRisk ManagementQuantitative Trading

Steffen Fonvig is the founder and CEO of Fonvig Group, a holding company spanning fintech, media, and health tech ventures. Since 2013, he has built and operated multiple technology companies focused on data-driven products.

In 2026, he created Fillipio — an AI-powered stock screening platform that scores over 4,900 stocks daily across the US, UK, Europe, and Canada. The platform combines technical analysis with an Optuna-optimized LightGBM machine learning model trained on 58 features to generate daily BUY/SELL signals, Risk Radar alerts, and AI market briefings.

Steffen's approach to building Fillipio reflects his philosophy of radical transparency: every pick, every trade, every win, and every loss is published. The platform's AI has never issued a STRONG BUY signal — a deliberate design choice that prioritizes honesty over hype.

Based in Oslo, Norway, Steffen manages the full technology stack behind Fillipio, including the data pipeline, ML model training, Kubernetes infrastructure, and the Next.js frontend.

Website LinkedIn X / Twitter Telegram

Articles by Steffen

What Is a Bear Market? Definition, History, and How to Protect Your Portfolio

A bear market is a 20%+ decline in stock prices from recent highs. Learn what causes bear markets, how long they last, historical examples, and how AI tools like Risk Radar can help protect your investments.

Mar 28

6 min read

What Is a Bull Market? Definition, Characteristics, and How to Invest

A bull market is a sustained period where stock prices rise 20% or more from recent lows. Learn what defines a bull market, how to identify one, historical examples, and strategies for investing during one.

Mar 28

5 min read

What Is a Market Correction? Why 10% Drops Are Normal and What to Do

A market correction is a 10-20% decline from recent highs. Learn why corrections are a normal part of investing, how they differ from bear markets and crashes, and how to use them as buying opportunities.

Mar 28

5 min read

What Is a Market Crash? Famous Crashes, Warning Signs, and How to Survive One

A market crash is a sudden, severe decline of 20% or more in stock prices over days or weeks. Learn about history's most devastating crashes, the warning signs, and how to protect your portfolio.

Mar 28

6 min read

What Is a Recession and How Does It Affect the Stock Market?

A recession is a sustained period of economic decline, typically defined as two consecutive quarters of negative GDP growth. Learn how recessions affect stock prices, which sectors hold up best, and how to position your portfolio.

Mar 28

7 min read

What Is a Sideways Market? How to Invest When Stocks Go Nowhere

A sideways or range-bound market is when stock prices trade in a narrow range without clear direction. Learn what causes choppy markets, how to identify them, and which strategies work when the trend is flat.

Mar 28

5 min read

Bear Market Detected: What Our AI Sees Right Now

Our regime classifier has shifted to BEAR. Here's what the data shows, how our strategies are adapting, and what it means for your portfolio.

Mar 25

2 min read

The Complete Guide to Getting Started With Fillipio

Everything you need to know to get the most out of Fillipio — from your first login to building a daily routine. Covers every feature, every page, and exactly how to use the AI scoring system to make better investment decisions.

Mar 25

12 min read

Week 1 Recap: March 20-25, 2026 — Our First Trades

Fillipio's first week of live trading. One position opened, 11 picks tracked, and the AI scored 7,700+ stocks daily. Here's the full breakdown.

Mar 25

2 min read

Why Our AI Says 'Hold' 76% of the Time — And Why That's a Feature, Not a Bug

Most platforms scream BUY on everything because excitement sells subscriptions. Fillipio's AI is deliberately conservative. Here's why that makes it more useful.

Mar 25

3 min read

How Risk Radar Works: The ML Model Behind Our Strongest Signal

Risk Radar identifies stocks most likely to decline in the near term. Here's how the LightGBM model works, what it looks at, and why it's better at finding losers than winners.

Mar 24

3 min read

Fillipio Is Live: What to Expect in the First Months

We just launched Fillipio with 7,700+ stocks, ML predictions, and live pick tracking. Here's what's working, what's coming next, and how we plan to earn your trust.

Mar 23

2 min read

Browse all articles