There's rare good news on the retirement front

For younger, still long-term, savers between the ages of 35 and 39, balances are also decent — an average of $131,000. That’s encouraging, said Katie Taylor, a director of thought leadership focused on workplace retirement plans at Fidelity. The company’s rule of thumb is that those in their late thirties need two to three times their salary in a 401(k). “For many people, $131,000 could be right in that wheelhouse,” said Taylor.

What the fund giant didn’t find: a lot of portfolio shuffling in the wake of January’s volatility. The percent of exchanges — when someone shifts allocations within a 401(k)—rose to 4.8 percent, from 4.5 percent. The average equity allocation inched down to 52.6 percent, from 53.6 percent.

That kind of inertia can be good if a saver has the right asset allocation. It bodes well for millennials, many of whom are auto-enrolled into target-date funds in 401(k) plans. Sixty-three percent of millennials in plans tracked by Fidelity are in target-date funds.

The not-so-good first-quarter news is that while the S&P 500 index was close to flat, year over year, the average 401(k) account balance fell an average 5 percent. That led to an average of $87,300 for 401(k)s, down from $91,800 a year ago. The average IRA balance slid as well, to $89,300, from $94,100 in 2015′s first quarter.

The performance isn’t as bad as it seems, however. Some of the 5 percent drop is simply because of 400,000 new 401(k) accounts at Fidelity, said Taylor: “If those people are just starting out or were just re-enrolled, and the balance is zero or is very low, it can affect the average.”

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Beyond a traditional retirement