Guillaume Tosi

Economics taught me how markets should work. Experience taught me how they actually work. The gap between those two? That's where opportunity lives. I spent the first phase of my career hunting innovation—identifying and integrating startups into established businesses. Pattern recognition became second nature: which ideas had legs, which founders could execute, which business models would scale. Occasionally, that instinct translated to personal investments. First Shopify, then Rocket Lab. The wins funded curiosity. Once I discovered quantitative value investing: Greenblatt's Magic Formula, Carlisle's Acquirer's Multiple, Gray's momentum research, and others. For many years, I've tested, combined, and refined these frameworks—first with backtests, then with real capital, now through wikifolio transparency. My most successful wikifolio now? Acquirers Momentum: deep value filtered through momentum to avoid dead money, concentrated into 1-5 large-cap positions held weeks to months. Position sizing makes traditional investors nervous. A wikifolio holding 100% in one company? Heresy!! But here's the nuance: these are large-cap, liquid businesses held for weeks to months, not illiquid micro-caps held for years. The risks aren't what they seem. Studies show diversification benefits plateau around 6-12 holdings—beyond that, you're just buying the index with extra steps. I prefer concentrated conviction over diluted mediocrity. Every wikifolio reflects strategies I've traded personally—often for years—before going public. Experimental ideas stay non-investable until results justify risk. Transparency matters: every trade, every decision, every result is visible. No marketing. No fluff. Just algorithms, execution, and accountability. Markets reward patience and punish overconfidence. I aim to stay humble while staying convicted. Risikohinweis / Disclaimer: Hinweis nach §34b WpHG zur Begründung möglicher Interessenskonflikte: Der Trader kann Short- und/oder Long-Positionen in den behandelten Aktien/Wertpapieren halten. Der Trader übernimmt keine Verantwortung für jegliche Konsequenzen und Verluste, die durch Verwendung seiner Informationen entstehen. Die hier genannten Instrumente stellen keine Anlageberatung und auch keine Aufforderung zum Kauf oder Verkauf von Wertpapieren dar. Der Trader weist daraufhin, dass er jederzeit Positionen in den jeweiligen Werten halten und auch jederzeit wieder auflösen kann. mehr anzeigen