The New York Stock Exchange (NYSE) is seen in the financial district of lower Manhattan during the outbreak of the coronavirus disease (COVID-19) in New York City, U.S., April 26, 2020. Jeenah Moon/Reuters About 29% of investors view COVID-19 variants as the greatest risk to markets, according to a JPMorgan survey.Investors also cited a possible correction in expensive equity sectors and stronger inflation as dangers to the bull market.Six-in-ten respondents deemed cryptocurrencies as being in a bubble, and nearly all said they believe fraud is at least somewhat prevalent in the space.Sign up here for our daily newsletter, 10 Things Before the Opening Bell.Investors are split on which downside risks are most likely to topple the stock market's bull run.JPMorgan surveyed clients attending its Macro Quantitative conference in late January on several aspects of the current investing landscape.