Funds / Individual fund

I Fund

$63.35 a share on Oct 27, 2026, +0.79% on the day.

Returns to Oct 27, 2026

Year to date: 14.2%; from Dec 31, 2025
1 year: 17.2%; from Oct 27, 2025
3 years: 22.2%; a year, from Oct 27, 2023
5 years: 9.9%; a year, from Oct 27, 2021
10 years: 10.1%; a year, from Oct 27, 2016
Since start: 8.1%; a year, from Jun 2, 2003

Share price, month endslog scale

Spans longer than a year show the yearly rate. Share prices include the fund's earnings and expenses, so a price change is the return.

What the I Fund holds

An index fund of stock markets outside the United States, each stock in proportion to its market value. Through July 31, 2024 it tracked the MSCI EAFE Index; since then it tracks the MSCI ACWI IMI ex USA ex China ex Hong Kong Index, so returns before and after that date follow different indexes.

Legal name: International Stock Index Investment Fund
First priced: Jun 2, 2003 in the official daily price file; the fund itself is older

Since Jun 2, 2003

$10,000 on Jun 2, 2003 would be about

$62,300

by Oct 27, 2026. In the C Fund over the same span: about $124,000.

Growth per year: 8.1%; C Fund 11.4%
Best year: 32.5%; 2025
Worst year: −42.4%; 2008
Biggest drop: 61%; peak to trough; C Fund 55%

I FundC Fund onlylog scale

Year by year

Year	I Fund	C Fund
2003*	26.8%	16.2%
2004	20.0%	10.8%
2005	13.6%	5.0%
2006	26.3%	15.8%
2007	11.4%	5.5%
2008	−42.4%	−37.0%
2009	30.0%	26.7%
2010	7.9%	15.1%
2011	−11.8%	2.1%
2012	18.6%	16.1%
2013	22.1%	32.4%
2014	−5.3%	13.8%
2015	−0.5%	1.5%
2016	2.1%	12.0%
2017	25.4%	21.8%
2018	−13.4%	−4.4%
2019	22.5%	31.5%
2020	8.2%	18.3%
2021	11.5%	28.7%
2022	−13.9%	−18.1%
2023	18.4%	26.2%
2024	4.3%	25.0%
2025	32.5%	17.8%
2026*	14.2%	13.8%

* part of a year. Returns are from official daily share prices; each move happens at the close of its day.

Month by month

Monthly returns of the I Fund by year and month
Year	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec	Year
2003						0.6%*	2.3%	2.4%	3.1%	6.1%	2.2%	7.7%	26.8%*
2004	1.3%	2.2%	0.6%	−2.3%	0.3%	2.9%	−3.8%	1.0%	2.1%	3.9%	6.2%	4.4%	20.0%
2005	−1.9%	4.3%	−2.5%	−2.3%	−0.4%	1.9%	3.1%	3.2%	3.7%	−2.9%	2.4%	4.6%	13.6%
2006	6.1%	−0.3%	3.3%	4.8%	−3.9%	0.0%	1.0%	2.8%	0.1%	3.9%	3.0%	3.1%	26.3%
2007	1.3%	0.2%	2.6%	3.8%	2.5%	0.2%	−2.4%	−0.7%	5.4%	4.5%	−3.7%	−2.3%	11.4%
2008	−8.5%	−0.7%	0.2%	5.5%	1.1%	−8.1%	−3.7%	−4.2%	−12.3%	−20.6%	−6.7%	7.7%	−42.4%
2009	−11.9%	−10.2%	7.2%	12.1%	13.4%	−1.1%	9.7%	4.9%	3.8%	−2.4%	3.2%	1.4%	30.0%
2010	−5.2%	0.1%	6.3%	−2.4%	−11.2%	−1.8%	10.8%	−3.1%	9.8%	3.6%	−4.8%	8.1%	7.9%
2011	2.4%	3.3%	−2.2%	6.0%	−2.9%	−1.2%	−1.6%	−9.0%	−10.5%	9.5%	−2.5%	−2.0%	−11.8%
2012	5.4%	5.1%	0.1%	−1.9%	−11.4%	7.1%	0.6%	3.3%	3.0%	0.8%	2.4%	4.0%	18.6%
2013	4.5%	−1.0%	0.9%	5.3%	−3.1%	−2.8%	5.3%	−1.3%	7.4%	3.4%	0.7%	1.5%	22.1%
2014	−4.0%	5.6%	−0.6%	1.5%	1.7%	1.0%	−2.0%	−0.1%	−3.8%	−0.6%	0.5%	−4.1%	−5.3%
2015	1.2%	6.0%	−1.4%	4.1%	−0.4%	−2.8%	2.1%	−7.4%	−5.0%	7.1%	−0.9%	−2.0%	−0.5%
2016	−5.6%	−2.8%	6.6%	1.9%	0.3%	−3.3%	5.1%	0.1%	1.2%	−2.0%	−2.0%	3.4%	2.1%
2017	2.9%	1.4%	2.9%	2.6%	3.8%	−0.2%	2.9%	0.0%	2.5%	1.5%	1.1%	1.6%	25.4%
2018	5.0%	−5.1%	−0.8%	2.0%	−2.1%	−1.2%	2.5%	−1.9%	0.9%	−7.9%	−0.1%	−4.8%	−13.4%
2019	6.6%	2.6%	0.7%	2.9%	−4.7%	5.9%	−2.1%	−1.8%	2.9%	3.6%	1.2%	3.2%	22.5%
2020	−2.7%	−7.7%	−13.9%	6.4%	4.5%	3.4%	2.3%	5.1%	−2.6%	−4.0%	15.5%	4.6%	8.2%
2021	−1.1%	2.3%	2.3%	3.1%	3.6%	−1.4%	0.7%	1.8%	−2.8%	2.5%	−4.7%	5.1%	11.5%
2022	−4.0%	−2.6%	−0.3%	−6.4%	1.2%	−8.2%	5.2%	−5.8%	−9.4%	6.0%	13.7%	−1.9%	−13.9%
2023	8.4%	−2.8%	3.1%	2.9%	−4.0%	4.6%	2.8%	−3.9%	−3.5%	−3.2%	8.5%	5.4%	18.4%
2024	−0.2%	2.7%	3.4%	−3.2%	4.9%	−1.6%	2.9%	3.2%	0.8%	−5.2%	0.0%	−2.8%	4.3%
2025	3.7%	0.9%	0.0%	4.2%	5.0%	3.7%	−1.5%	3.9%	3.2%	2.1%	0.4%	3.0%	32.5%
2026	5.9%	6.0%	−9.3%	9.1%	4.9%	0.0%	−1.0%	3.3%	−2.3%	−2.0%*			14.2%*

Blue, the month was up; red, it was down; the deeper the colour, the bigger the move. * part of a month or year.

Rolling returns, a year at a time
Over	Spans	Best	Worst	Average	Lost money
1 year	22	32.5%to 2025	−42.4%to 2008	8.5%	6 of 22
3 years	20	19.9%to 2006	−6.9%to 2010	5.9%	4 of 20
5 years	18	12.4%to 2013	−4.5%to 2011	4.8%	2 of 18
10 years	13	8.7%to 2025	1.0%to 2016	5.3%	0 of 13

Every span

Annualised return of each window ending at each year end
Ending	1 year	3 years	5 years	10 years
2025	32.5%	17.8%	9.4%	8.7%
2024	4.3%	2.0%	5.1%	5.6%
2023	18.4%	4.3%	8.5%	4.6%
2022	−13.9%	1.2%	1.9%	5.0%
2021	11.5%	13.9%	9.9%	8.4%
2020	8.2%	4.7%	8.0%	5.9%
2019	22.5%	10.0%	6.2%	5.8%
2018	−13.4%	3.5%	0.9%	6.5%
2017	25.4%	8.4%	8.1%	2.2%
2016	2.1%	−1.3%	6.9%	1.0%
2015	−0.5%	4.8%	3.8%	3.2%
2014	−5.3%	11.1%	5.5%	4.6%
2013	22.1%	8.5%	12.4%	7.1%
2012	18.6%	4.1%	−3.3%
2011	−11.8%	7.4%	−4.5%
2010	7.9%	−6.9%	2.6%
2009	30.0%	−5.9%	3.7%
2008	−42.4%	−6.8%	2.0%
2007	11.4%	16.9%
2006	26.3%	19.9%
2005	13.6%
2004	20.0%

Each figure is the yearly rate over a span ending on the last priced day of that year. A blank cell means the span starts before the fund did.

The 5 biggest drops
High	Low	Fall	Fell over	Back after
Oct 31, 2007	Mar 9, 2009	−60.9%	1.4 yrs	6.5 yrs
Jan 17, 2020	Mar 23, 2020	−33.2%	66 days	301 days
Sep 7, 2021	Sep 27, 2022	−29.1%	1.1 yrs	2.4 yrs
May 21, 2015	Feb 11, 2016	−22.6%	266 days	1.9 yrs
Jan 26, 2018	Dec 24, 2018	−21.1%	332 days	1.9 yrs

Past performance does not predict future returns. This is not investment advice.

Official TSP share prices through Oct 27, 2026.

Open the I Fund in the backtester to test a plan that moves in and out of it, or see every fund.