๐ง๐ต๐ฒ ๐๐๐ผ ๐น๐ฒ๐ป๐๐ฒ๐ ๐ผ๐ณ ๐ซ๐๐ฅ๐ฅ: ๐ฟ๐ฒ๐ฎ๐ฑ๐ถ๐ป๐ด ๐ฝ๐ฒ๐ฟ๐ณ๐ผ๐ฟ๐บ๐ฎ๐ป๐ฐ๐ฒ ๐ฎ๐ฐ๐ฟ๐ผ๐๐ ๐ฑ๐ถ๐ณ๐ณ๐ฒ๐ฟ๐ฒ๐ป๐ ๐๐ถ๐บ๐ฒ ๐ต๐ผ๐ฟ๐ถ๐๐ผ๐ป๐
In the last few posts, we explored why XIRR exists and how it translates the time value of money into a single measure of capital efficiency.
But as portfolios grow more complex, so does the question of how to read performance. Large setups experience multiple timelines at once: the long arc beginning with the first rupee deployed, and the shorter windows tracked for annual, quarterly, or event-driven reviews.
The same investment history can yield two valid XIRR readings - one since inception, and another for a specific period. Both come from the same logic. What changes is ๐ต๐ฉ๐ฆ ๐ธ๐ช๐ฏ๐ฅ๐ฐ๐ธ ๐ต๐ฉ๐ณ๐ฐ๐ถ๐จ๐ฉ ๐ธ๐ฉ๐ช๐ค๐ฉ ๐ต๐ฉ๐ฆ ๐ค๐ข๐ฑ๐ช๐ต๐ข๐ญโ๐ด ๐ซ๐ฐ๐ถ๐ณ๐ฏ๐ฆ๐บ ๐ช๐ด ๐ท๐ช๐ฆ๐ธ๐ฆ๐ฅ.
Understanding this difference is central to interpreting capital behaviour.
๐ญ. ๐ฆ๐ถ๐ป๐ฐ๐ฒ-๐ถ๐ป๐ฐ๐ฒ๐ฝ๐๐ถ๐ผ๐ป ๐ซ๐๐ฅ๐ฅ: ๐๐ต๐ฒ ๐ณ๐๐น๐น ๐ป๐ฎ๐ฟ๐ฟ๐ฎ๐๐ถ๐๐ฒ ๐ผ๐ณ ๐ฐ๐ฎ๐ฝ๐ถ๐๐ฎ๐น
The since-inception view absorbs everything from day one:
- initial deployment
- all follow-on capital
- interim income or distributions
- partial exits
- the most recent valuation
This creates a single annualised number that reflects the entire lifecycle of the portfolio till today. Earlier cashflows carry more weight because they remained invested longer, while later additions influence the rate less.
This lens is useful for evaluating long-horizon capital behaviour - how efficiently the strategy has compounded overall, regardless of the short-term fluctuations along the way.
๐ฎ. ๐ฃ๐ฒ๐ฟ๐ถ๐ผ๐ฑ-๐๐ถ๐๐ฒ ๐ซ๐๐ฅ๐ฅ: ๐ถ๐๐ผ๐น๐ฎ๐๐ถ๐ป๐ด ๐ผ๐ป๐ฒ ๐ฐ๐ต๐ฎ๐ฝ๐๐ฒ๐ฟ ๐ผ๐ณ ๐ฝ๐ฒ๐ฟ๐ณ๐ผ๐ฟ๐บ๐ฎ๐ป๐ฐ๐ฒ
Some questions, however, are about a shorter slice of time:
โHow did the portfolio behave this year?โ
โWhat was the outcome during this market phase?โ
Here, XIRR works with a different construction:
- the opening portfolio value becomes the starting cashflow
- only in-period transactions - additions, withdrawals, income - are included
- the closing value anchors the end
This produces a return for just that window, independent of everything that happened before it.
๐ฏ. ๐๐ผ๐ ๐๐ต๐ฒ ๐๐๐ผ ๐๐ถ๐ฒ๐๐ ๐ฐ๐ผ๐บ๐ฝ๐น๐ฒ๐บ๐ฒ๐ป๐ ๐ฒ๐ฎ๐ฐ๐ต ๐ผ๐๐ต๐ฒ๐ฟ
Since-inception XIRR tells you how the total pool of capital has compounded over its full life.
Period-wise XIRR explains how one chapter contributed to the broader journey.
Read together, they help investment teams distinguish:
- long-term capital efficiency vs short-term behaviour
- the impact of early deployment vs recent activity
- structural performance vs period-specific dynamics
Both numbers are correct - they answer different questions using the same underlying logic.
The example in the carousel shows a single set of cashflows and how the XIRR changes when the horizon changes, illustrating how each view is constructed in practice. ๐๐ผ
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