Here Are a Few Factors That Could Destroy Dow 20,000

In many respects, the market's rally has been fueled by more than just optimism on what pro-growth policies President Trump will enact.

Three factors that come to mind include a solid fourth-quarter earnings season, fueled by good reports from IBM (IBM) - Get Report ,  Goldman Sachs (GS) - Get Report  and JPMorgan Chase (JPM) - Get Report ; a weakening U.S. dollar that could boost profits from multinationals like Procter & Gamble (PG) - Get Report  in the first quarter; and flat-out trading momentum.