In Friday's blog post, called "Averting retirement disaster," I described the risk-averse approach to retirement planning that Erin Botsford writes about in her book, "The Big Retirement Risk: Running Out of Money Before You Run Out of Time."

I'll reiterate: It's a must-read for those who are approaching retirement. If you don't want to subject your portfolio to the whims of the market and take a chance on having to postpone your golden years due to market mishaps, you need to adopt a defensive stance. But how can her philosophical investing approach be put into retirement-planning practice?

I asked Botsford if she would design a portfolio for a hypothetical married couple, age 55, with $500,000 between them in retirement accounts, plus a cash-balance plan worth $130,000. They want to retire at 62 and plan to continue saving 15 percent of their income in their respective workplace plans until then. They expect to have the house paid off by the time they retire. They will need a minimum of $4,000 a month to meet basic needs and would like an additional $2,000 a month to fund vacations, hobbies and dining out. They harbor no illusions about buying a second home or a boat.

How should they allocate their portfolio now, and then at age 62?

Botsford stipulates that each couple's circumstances are different, so this would not be a one-size-fits-all solution. But here's her advice for the hypothetical couple while they're in their mid-50s: Allocate 50 percent to short-term bonds, another 30 percent to intermediate-term bonds and 20 percent to blue-chip stocks at this point in time.

"This couple is close enough to retirement that they should not be taking any significant risks with their investments," Botsford says. "Since they have the ability to invest tax deferred into their 401(k)s and have a company match, it makes sense for them to continue to do so. However, investment options are often limited inside of 401(k) plans. They should consider short-, medium-term bond funds to get some return on their money without taking too much risk from a high-equity position."

If all goes according to plan, Botsford calculates that their retirement portfolio will be worth about $835,000 in seven years if they continue to contribute 15 percent of their salary, assuming a 4 percent annualized return.

The couple's after-tax needs are $48,000 per year, and Botsford projects that their Social Security benefits would amount to about $28,000, assuming a tax bracket of 15 percent.

"This leaves a shortfall of $20,000 to cover their needs," she says. "I like to use lifestyle investments to fund the needs category. These could be investments such as bonds, annuities, non-traded real estate investment trusts and a number of other similar investments. These are all income-producing investments that, as of today, we should be able to get an average income of 5 percent from. At their 15 percent tax bracket, it would take $470,000 invested in these types of products to produce the additional $20,000 needed.

The rest is here:
Investing for retirement security