My 401(k) allows me to choose some index funds as investments, but there is not a “Total US Stock Market” option - instead there are “Small-Cap Index Fund,” “Mid-Cap Index Fund,” and “Large-Cap Index Fund” options (there is an “International Index Fund” and a “Bond Index” as well, so those 2 of the 3 fund portfolio are clear).
I’d like to build my own “Three-Fund” portfolio because there is not a Target Date INDEX Fund and the expense ratio is around .4% for the Target Date Fund that is available (vs. the incredibly low expense ratios for the index funds).
Will I need to build a “Five-Fund” portfolio in this case?
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~10% Bond Index,
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~36% International Index, and
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~54% broken between the Small, Mid, and Large-cap Index Funds?
If so, should I just split that 54% equally between Small, Mid, and Large-cap Index Funds? Or should it be more like ~27% Large-Cap Index Fund, ~14% Mid-Cap Index Fund, and ~13% Small-Cap Index Fund (proportions that seem to be close to how the 2055 Target-Date Retirement Fund option in my 401(k) is balanced)?
Thanks!
David