Current Yield = “Adjusted TTM dividends” / “latest close”
Cost Yield = “Adjusted TTM dividends” / “average price”
Note: Average price includes fees of your buy transactions.
Portfolio Current Yield = Sum (Current Yield of each stock in your portfolio x Portfolio %)
Portfolio Cost Yield = Sum (Cost Yield of each stock in your portfolio x Portfolio %)
If Portfolio Cost Yield > Portfolio Current Yield, it means that your portfolio have gained in value (i.e. P&L > 0)
If Portfolio Cost Yield < Portfolio Current Yield, it means that your portfolio is in the red (i.e. P&L < 0)