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You can cash out at any time to keep your index.
Each hit lifts the index 5% times the multiplier. Every extra hit in a row adds 0.5 to the multiplier, up to ×5, so a long streak compounds fast. A miss costs 5% and resets the streak. Two misses end the game. Cash out any time to lock in your index.
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One new question every day at midnight. Figures are rounded estimates for a game, not financial data. Your result is kept in this browser only.