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For many workers, a traditional retirement is not part of their plans.

Among baby boomers still in the workforce, 59% expect to keep working into retirement, a new study from Voya Financial shows. For Generation X, that share is 60% and for millennials, 49%. Overall, 54% of all workers say their retirement years will include a job of some sort.

"The definition of retirement is evolving and will keep evolving," said Charlie Nelson, CEO of Retirement and Employee Benefits for Voya. "It's not going to be about working until a certain age and then switching to no work."

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The study, based on a survey of about 1,000 people done in waves from March through July, explored workers' attitudes about retirement during the pandemic. Voya defines baby boomers as those born 1946 to 1964; Gen X, 1965 to 1980; and millennials, 1981 to 1996.

The results come as economic uncertainty from the pandemic persists and unemployment remains relatively high, at about 10%. At the same time, however, the stock market despite dropping in Thursday morning trading is far above its lows earlier in the year.

The S&P 500 index closed Wednesday at 3580.84, up 60% from its March 23rd low of 2237.40. The Dow JonesIndustrial Average has gained 56.5% since bottoming out in March at 18,591, closing at 29,100.

Many respondents (56%) noted their reasons for wanting to continue working in retirement included for their mental well-being, while 40% said it's because they want a safety net to cover unexpected costs and prepare for market volatility.

"There may be financial reasons they want to keep working, or it might be because they want to stay mentally alert," Nelson said.

While the coronavirus has caused economic uncertainty and a squeeze on households that have lost income from being laid off or furloughed, Voya's survey suggests that saving for retirement remains a priority, with 55% of respondents saying they'd rather save more for retirement than be completely debt-free.

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Majority of workers expect their 'retirement' to include a job, survey shows - CNBC