It would be much better — tens or even hundreds of thousands of dollars better — if the market rose more steadily and the bulk of the 401(k) contributions could then rise along with it. Buy low and sell high, right?

A true crash would take care of this problem. But the market’s big fall from 2000 through 2002 doesn’t fit the definition, because it didn’t come close to erasing the effects of the bubble. Stocks are still more expensive today, relative to corporate earnings over the previous decade, than at any time besides the late 1920s and the dot-com boom.

So unless you’re about to retire or sell stock for some other reason, you shouldn’t get too upset about the market’s fall. As long as you are planning on more buying than selling over the next decade or two, a market correction is your friend.

It’s also likely to improve the nation’s long-term economic prospects. The bull market of 1990s, combined with the housing boom, fooled many people into thinking they didn’t need to save money. They evidently figured that their existing assets would continue to soar in value and could serve as their nest egg. Last year, Americans saved only 0.4 percent of their disposable income, down from 7 percent in 1990.

This decline in personal savings has set the stage for all kinds of problems. The biggest may be that less savings, by definition, equals a smaller pool of capital available for overall investment. Less investment — be it in medical technology or software — will mean slower economic growth and lower standards of living down the road.

Fortunately, the savings rate has begun to climb, especially since the housing market turned. So far this year, Americans have saved 0.8 percent of their income, and the number should continue to rise. As Joe Davis, an economist at the Vanguard Group, the investment company, said, “This will be a slow-moving and ongoing process, but I think a welcome one.”

The other ostensible pieces of bad news have their own silver linings. As the cost of gas has soared to $3 a gallon, from an inflation-adjusted low of about $1.20 in 1999, Americans have finally started buying more efficient cars and trucks. For the first time since the mid-1980s, the fuel economy of new vehicles has increased for two straight years, the Environment Protection Agency recently reported. This will slow global warming and make life a little less comfortable for oil-rich autocrats (though not nearly as much as a carbon tax would).