Even as the Dow Jones Industrial Average surged past 20,000, Americans' confidence in a secure retirement declined, according to a recent  study sponsored by McLean, Va.-based Capital One Investing.

While 62 percent of the respondents said that they feel like they’re saving enough to retire, Capital One Investing found a decline in retirement confidence, from 72 percent in 2015 to 64 percent in 2016.  

The respondents cited lack of knowledge and experience as the main reasons for their low levels of investing confidence, but 49 percent also said that distrust of the markets and of the financial industry impacts their confidence.

Forty-nine percent of the respondents said they have established a long-term financial plan. Many respondents were saving anyway—65 percent said that they were putting away a portion of their income for retirement.

Most respondents were open to receiving some level of financial advice via technology, but 74 percent said they would prefer to consult a human advisor in periods of market volatility.

Capital One Investing paid ORC International to survey 1,003 U.S. adults by phone in January.