Apply formula to first row

Question

I am trying to apply one formula to the first row in my table and apply a different formula for the remaining rows.

I am getting an error

Msg 156, Level 15, State 1
Incorrect syntax near the keyword "Case"

Code:

SELECT 
    [Total Money Invested] 
FROM 
    [dbo.SPY_HISTORY1],
    CASE 
        WHEN id = 1 THEN [Total Money Invested] * (1 + [Return])
        ELSE [Portfolio_Remaining] * (1 + [Return]) 
    END AS [Equity_Portfolio];
    END
FROM 
    [dbo.SPY_HISTORY1];