Skip to content

📊 Period PnL (Profit and Loss)

⬅️ Back to Performance Metrics Overview

💡 What is Period PnL?

The absolute monetary gain or loss generated by your portfolio within \([t_0, t_1]\), adjusted for external cash flows.

🧮 Formula

\[ \boxed{\mathrm{PnL}_{\text{period}} = \mathrm{NAV}(t_1) - \mathrm{NAV}(t_0) - \mathrm{ECF}_{[t_0, t_1]}} \]

Where \(\mathrm{ECF}\) = Net External Cash Flows (deposits − withdrawals in period).

🧮 Decomposition

\[ \mathrm{PnL}_{\text{period}} = \Delta\mathrm{UGL} + \mathrm{Realized} + \mathrm{Income} - \mathrm{Fees} + \mathrm{Other} \]
Component Definition
\(\Delta\mathrm{UGL}\) Change in unrealized gain/loss over the period
Realized Sum of (sell proceeds − cost basis) for SELLs in period
Income DIVIDEND + INTEREST in period
Fees FEE + TAX in period
Other Residual (FX effects, rounding)

🎯 Per-Asset Contribution

For each position \((a,b)\):

\[ \mathrm{PnL}(a,b) = \Delta\mathrm{UGL}(a,b) + \mathrm{Realized}(a,b) + \mathrm{Income}(a,b) - \mathrm{Fees}(a,b) \]

The position set includes all activity in the period:

\[ \mathcal{P} = \mathcal{P}(t_0) \cup \mathcal{P}(t_1) \cup \text{keys(Realized)} \cup \text{keys(Income)} \cup \text{keys(Fees)} \]

🔗 See Portfolio Engine — §7 Period Contribution for details.

📝 Example

  • NAV at \(t_0\): €27,000
  • Deposits in period: €1,000
  • NAV at \(t_1\): €33,000
\[ \mathrm{PnL} = 33\,000 - 27\,000 - 1\,000 = +5\,000 \text{ EUR} \]