The Dow's record-fast sprint to 26,000 early in the new year is raising concerns on Wall Street that the stock market may be in danger of overheating.
Indeed, the Dow Jones industrial average's more than 1,000-point rise from 25,000 to "26K" in the past seven trading days has some investment pros warning that the nearly nine-year-old bull market may be entering its "euphoria phase" — which typically marks the final stage of a long, upward climb for stocks.