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What is the valuation of a company based on?
The textbook answer would be "assets-liabilities+present discounted value of all future profit".  A&L is usually simple (if a company has an extra $1m in cash, it's worth $1m more; if it has an extra $1m in debt, it's worth $1m less). If a company with ~0 assets and $50k in profit has a $1m valuation, then that implies that whoever makes that valuation (wants to buy at that price) really believes one of two things - either the future profit will be significantly larger than $50k (say, it's rapidly growing);  or the true worth of assets is much more - say, there's some IP/code/patents/people that have low book value but some other company would pay $1m just to get that. The point is that valuation is subjective since the key numbers in the calculations are not perfectly known by anyone who doesn't have a time machine, you can make estimates but the knowledge to make the estimates varies (some buyers/sellers have extra information), and they can be influenced by those buyers/sellers; e.g. for strategic acquisitions the value of company is significantly changed simply because someone claims they want to acquire it. And, $1m valuation for a company with $500m in profits isn't appropriate - it's appropriate only if the profits are expected to drop to zero within a couple years; a stagnant but stable company with $500m profits would be worth at least $5m and potentially much more.