This can be found in the Value tab of every stock's Summary page or in your portfolio under the Valuation tab.
Summary page Valuation tab - https://seekingalpha.com/symbol/AAPL/valuation/metrics
Valuation tab in portfolio - https://seekingalpha.com/account/portfolio/value
If the Valuation tab is missing under portfolio, then you can add it by clicking on Add View
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