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by sobani 7 days ago
They do have identical value.

500 shares of company A is worth 100% of the market cap of company A.

500 shares of company B is also worth 100% of the market cap of company B.

So if you have 5 shares of each, you'll have 1% of the market cap of each, even if one of those companies finds the cure for cancer or turns out to be a money furnace.