Wall Street is flashing signs of a stock market melt-up, or a rapid and unexpected rise in stock prices, and some strategists are drawing uncomfortable parallels to the dot-com bubble of the late 1990s.
The S&P 500 (^GSPC) and Nasdaq Composite (^IXIC) hovered at record highs on Monday as markets are having one of the best earnings seasons in years, and a wave of upward revisions has caught even the bulls off guard.