Here are some tips for divvying up your retirement investments

Dear Liz: With all the investment options offered in 401(k) plans, how as a contributor do I know where to place my money?

Answer: Too many investment options can confuse contributors and lower participation rates, according to a study by social psychologist Sheena Iyengar of Columbia University in cooperation with the Vanguard Center for Retirement Research. The more options, the more likely participants are to simply divide their money evenly among the choices, according to another study published in the Journal of Marketing Research. That’s a pretty random method of asset allocation and one that may not get people to their retirement goals.

As a participant, you want a low-cost, properly diversified portfolio of investments. For most people, that means a heavy weighting toward stock funds, including at least a dab of international stocks. Your human resources department or the investment company running the plan may be able to help with asset allocation.

Some plans offer free access to sophisticated software from Financial Engines or Morningstar that can help you pick among your available options. Once you have your target asset allocation, you’ll need to rebalance your portfolio, or return it to its original allocation, at least once a year. A good year for stocks could mean your portfolio is too heavily weighted with them, while a bad year means you need to stock up.

If that feels like too much work, you may have simpler options. Many plans provide a balanced fund, typically invested 60% in stocks and 40% in bonds, that provides automatic reallocation. The same is true for target-date funds, which are an increasingly popular choice. Pick the one with the date closest to your expected retirement year. If you’re 35, for example, you might opt for the Retirement 2045 fund.

It’s important, though, that you minimize costs because funds with high fees can leave you with significantly less money at retirement. The average target-date fund charged 0.73% last year. If you’re paying much more than that, and have access in your plan to lower-cost stock and bond funds, choose those instead.

No wedding, no Social Security benefits 

Dear Liz: I’m a female who has been with her male partner for 20 years. We are not married. In the event one of us dies, is the other entitled to the partner’s Social Security benefits? Or do we have to be legally married to qualify for benefits?

Answer: Your genders don’t matter. Your marital status does. To get Social Security benefits based on the other person’s work record, you need to make it legal.

Marriage offers hundreds of legal, financial and estate-planning advantages, and Social Security is certainly one of those. With married couples, lower-earning partners may qualify for bigger benefit spousal benefits than the retirement benefits they would receive on their own work records. After a death, the surviving spouse gets the larger of the couple’s two benefits. Social Security makes up more than half of most elderly people’s income, so this is no small deal.

Fiduciaries can help with estate trusts

Dear Liz: I enjoyed your recent column about spendthrift trusts. You’re right that when parents assign the job of trustee to one sibling for the benefit of another sibling, it creates a hazardous situation that often results in a court battle. The appointed professional trustee should be a neutral party. You recommended a bank or trust company to fill the bill.

However, there is a third and often better option: a licensed professional fiduciary. There are about 600 in California. We are independent fiduciaries licensed by the state to manage clients’ assets in trusts and estates.

Professional fiduciaries will take the smaller trusts and estates, since banks and trust companies usually require a minimum of $1 million to $2 million under management before accepting a trust or remainder estate. Banks and trust companies also typically charge fees based on the amount of money under management, whereas California Licensed Professional Fiduciaries normally charge on a time-incurred basis.

Fiduciaries also give the beneficiary an annual accounting. A case I have now came to me when the sibling trustee failed to account for money spent for nine years.

Answer: Thanks for highlighting this option. Licensed professional fiduciaries aren’t available everywhere, but certified public accountants also can serve this function. The attorney who drafts the trust may have recommendations.

Liz Weston is a personal finance columnist for NerdWallet. Questions may be sent to her at 3940 Laurel Canyon, No. 238, Studio City, CA 91604, or by using the "Contact" form at asklizweston.com. Distributed by No More Red Inc.