StockArena is a fantasy stock trading game. Pick five S&P 500 stocks, set your allocations, and enter a daily contest. Your portfolio is scored against real market prices and ranked on a live leaderboard.
Win or lose, you earn XP, unlock achievements, keep a streak alive, and climb six league tiers from Paper to Elite. A learning hub covers the basics if you are new to markets.
Everything is virtual. You start with 500 credits, no card required, no real money at stake.
What if you could run tonight before it happens? HouseKey Rehearse creates a synthetic night inside the Fortress operating model. Guests arrive, lines form, capacity changes and things go wrong. GPT-6 Astra reasons about the evolving night and proposes actions. You decide. Fortress simulates the consequences, then Astra reasons again. It’s a safe place for AI to experience the consequences of its decisions before they touch the real world.
