Returns to Oct 27, 2026
- Year to date
- 13.8%
- from Dec 31, 2025
- 1 year
- 13.6%
- from Oct 27, 2025
- 3 years
- 24.9%
- a year, from Oct 27, 2023
- 5 years
- 12.7%
- a year, from Oct 27, 2021
- 10 years
- 15.6%
- a year, from Oct 27, 2016
- Since start
- 11.4%
- a year, from Jun 2, 2003
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 C Fund holds
An index fund designed to track the S&P 500 Index, holding each stock in proportion to its market value.
- Legal name
- Common 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
$124,000
by Oct 27, 2026.
- Growth per year
- 11.4%
- 22 full years
- Best year
- 32.4%
- 2013
- Worst year
- −37.0%
- 2008
- Biggest drop
- 55%
- peak to trough
Year by year
| Year | C Fund |
|---|---|
| 2003* | 16.2% |
| 2004 | 10.8% |
| 2005 | 5.0% |
| 2006 | 15.8% |
| 2007 | 5.5% |
| 2008 | −37.0% |
| 2009 | 26.7% |
| 2010 | 15.1% |
| 2011 | 2.1% |
| 2012 | 16.1% |
| 2013 | 32.4% |
| 2014 | 13.8% |
| 2015 | 1.5% |
| 2016 | 12.0% |
| 2017 | 21.8% |
| 2018 | −4.4% |
| 2019 | 31.5% |
| 2020 | 18.3% |
| 2021 | 28.7% |
| 2022 | −18.1% |
| 2023 | 26.2% |
| 2024 | 25.0% |
| 2025 | 17.8% |
| 2026* | 13.8% |
* part of a year. Returns are from official daily share prices.
Month by month
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Year |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2003 | 0.9%* | 1.8% | 1.9% | −1.1% | 5.7% | 0.9% | 5.2% | 16.2%* | |||||
| 2004 | 1.8% | 1.3% | −1.5% | −1.5% | 1.4% | 1.9% | −3.2% | 0.3% | 1.1% | 1.5% | 4.1% | 3.4% | 10.8% |
| 2005 | −2.4% | 2.1% | −1.7% | −1.9% | 3.1% | 0.2% | 3.7% | −0.9% | 0.8% | −1.7% | 3.8% | 0.1% | 5.0% |
| 2006 | 2.7% | 0.2% | 1.3% | 1.3% | −2.9% | 0.1% | 0.6% | 2.4% | 2.6% | 3.3% | 1.9% | 1.4% | 15.8% |
| 2007 | 1.5% | −1.9% | 1.1% | 4.4% | 3.5% | −1.7% | −3.1% | 1.5% | 3.8% | 1.6% | −4.2% | −0.7% | 5.5% |
| 2008 | −6.0% | −3.3% | −0.5% | 4.9% | 1.3% | −8.4% | −0.8% | 1.5% | −8.9% | −16.8% | −7.2% | 1.1% | −37.0% |
| 2009 | −8.4% | −10.6% | 8.8% | 9.6% | 5.6% | 0.2% | 7.6% | 3.6% | 3.7% | −1.9% | 6.0% | 1.9% | 26.7% |
| 2010 | −3.6% | 3.1% | 6.0% | 1.6% | −8.0% | −5.2% | 7.0% | −4.5% | 8.9% | 3.8% | 0.0% | 6.7% | 15.1% |
| 2011 | 2.4% | 3.4% | 0.0% | 3.0% | −1.1% | −1.7% | −2.0% | −5.4% | −7.0% | 10.9% | −0.2% | 1.0% | 2.1% |
| 2012 | 4.5% | 4.3% | 3.3% | −0.6% | −6.0% | 4.1% | 1.4% | 2.2% | 2.6% | −1.9% | 0.6% | 0.9% | 16.1% |
| 2013 | 5.2% | 1.4% | 3.7% | 1.9% | 2.3% | −1.3% | 5.1% | −2.9% | 3.1% | 4.6% | 3.1% | 2.5% | 32.4% |
| 2014 | −3.5% | 4.6% | 0.8% | 0.7% | 2.4% | 2.1% | −1.4% | 4.0% | −1.4% | 2.4% | 2.7% | −0.2% | 13.8% |
| 2015 | −3.0% | 5.8% | −1.6% | 1.0% | 1.3% | −1.9% | 2.1% | −6.0% | −2.5% | 8.4% | 0.3% | −1.6% | 1.5% |
| 2016 | −5.0% | −0.1% | 6.8% | 0.4% | 1.8% | 0.3% | 3.7% | 0.1% | 0.0% | −1.8% | 3.7% | 2.0% | 12.0% |
| 2017 | 1.9% | 4.0% | 0.1% | 1.0% | 1.4% | 0.6% | 2.1% | 0.3% | 2.1% | 2.3% | 3.1% | 1.1% | 21.8% |
| 2018 | 5.7% | −3.7% | −2.5% | 0.4% | 2.4% | 0.6% | 3.7% | 3.3% | 0.6% | −6.8% | 2.0% | −9.0% | −4.4% |
| 2019 | 8.0% | 3.2% | 1.9% | 4.0% | −6.4% | 7.0% | 1.4% | −1.6% | 1.9% | 2.2% | 3.6% | 3.0% | 31.5% |
| 2020 | 0.0% | −8.2% | −12.4% | 12.8% | 4.8% | 2.0% | 5.6% | 7.2% | −3.8% | −2.7% | 10.9% | 3.8% | 18.3% |
| 2021 | −1.0% | 2.8% | 4.4% | 5.3% | 0.7% | 2.3% | 2.4% | 3.0% | −4.7% | 7.0% | −0.7% | 4.5% | 28.7% |
| 2022 | −5.2% | −3.0% | 3.7% | −8.7% | −1.6% | −6.5% | 9.2% | −4.1% | −9.2% | 8.1% | 5.6% | −5.8% | −18.1% |
| 2023 | 6.3% | −2.4% | 3.7% | 1.6% | 0.4% | 6.6% | 3.2% | −1.6% | −4.8% | −2.1% | 9.1% | 4.5% | 26.2% |
| 2024 | 1.7% | 5.3% | 3.2% | −4.1% | 5.0% | 3.6% | 1.2% | 2.4% | 2.1% | −0.9% | 5.9% | −2.4% | 25.0% |
| 2025 | 2.8% | −1.3% | −5.6% | −0.7% | 6.3% | 5.1% | 2.2% | 2.0% | 3.6% | 2.3% | 0.2% | 0.1% | 17.8% |
| 2026 | 1.4% | −0.8% | −5.0% | 10.5% | 5.3% | −1.0% | −0.1% | 2.7% | −0.3% | 1.0%* | 13.8%* |
Blue, the month was up; red, it was down; the deeper the colour, the bigger the move. * part of a month or year.
| Over | Spans | Best | Worst | Average | Lost money |
|---|---|---|---|---|---|
| 1 year | 22 | 32.4%to 2013 | −37.0%to 2008 | 12.1% | 3 of 22 |
| 3 years | 20 | 26.0%to 2021 | −8.3%to 2008 | 10.7% | 3 of 20 |
| 5 years | 18 | 18.4%to 2021 | −2.2%to 2008 | 10.4% | 2 of 18 |
| 10 years | 13 | 16.6%to 2021 | 7.0%to 2016 | 11.4% | 0 of 13 |
Every span
| Ending | 1 year | 3 years | 5 years | 10 years |
|---|---|---|---|---|
| 2025 | 17.8% | 23.0% | 14.4% | 14.8% |
| 2024 | 25.0% | 8.9% | 14.5% | 13.1% |
| 2023 | 26.2% | 10.0% | 15.6% | 12.0% |
| 2022 | −18.1% | 7.6% | 9.4% | 12.6% |
| 2021 | 28.7% | 26.0% | 18.4% | 16.6% |
| 2020 | 18.3% | 14.1% | 15.2% | 13.9% |
| 2019 | 31.5% | 15.2% | 11.7% | 13.6% |
| 2018 | −4.4% | 9.3% | 8.5% | 13.2% |
| 2017 | 21.8% | 11.5% | 15.8% | 8.5% |
| 2016 | 12.0% | 8.9% | 14.7% | 7.0% |
| 2015 | 1.5% | 15.2% | 12.6% | 7.4% |
| 2014 | 13.8% | 20.5% | 15.5% | 7.7% |
| 2013 | 32.4% | 16.2% | 18.0% | 7.4% |
| 2012 | 16.1% | 10.9% | 1.7% | |
| 2011 | 2.1% | 14.2% | −0.2% | |
| 2010 | 15.1% | −2.8% | 2.3% | |
| 2009 | 26.7% | −5.6% | 0.5% | |
| 2008 | −37.0% | −8.3% | −2.2% | |
| 2007 | 5.5% | 8.7% | ||
| 2006 | 15.8% | 10.4% | ||
| 2005 | 5.0% | |||
| 2004 | 10.8% |
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.
| High | Low | Fall | Fell over | Back after |
|---|---|---|---|---|
| Oct 9, 2007 | Mar 9, 2009 | −55.2% | 1.4 yrs | 4.5 yrs |
| Feb 19, 2020 | Mar 23, 2020 | −33.8% | 33 days | 173 days |
| Jan 3, 2022 | Oct 12, 2022 | −24.5% | 282 days | 1.9 yrs |
| Sep 20, 2018 | Dec 24, 2018 | −19.4% | 95 days | 204 days |
| Feb 19, 2025 | Apr 8, 2025 | −18.8% | 48 days | 127 days |
Past performance does not predict future returns. This is not investment advice.
Official TSP share prices through Oct 27, 2026.
Open the C Fund in the backtester to test a plan that moves in and out of it, or see every fund.