Technology innovation can be very exciting; however, that excitement often finds itself in the form of high valuations.

The S&P 500 fell back below the 4200 level that was seen by so many as such an important resistance point on the way up, and the Nasdaq Composite Index, after its worst day for some time, dropped ...

The Nasdaq plunged 262.59 points or 2 percent to 12,581.22, while the S&P 500 slid 31.20 points or 0.7 percent to 4,173.11.

While the Nasdaq plunged 139.94 points or 1.4 percent to 10,213.29, the S&P 500 dove 46.03 points or 1.2 percent to 3,783.22 and the Dow tumbled 365.85 points or 1.1 percent to 32,875.71.

The tech-heavy Nasdaq led the way lower, plunging to its lowest closing level in over a year, while the Dow and the S&P 500 tumbled to one-month closing lows. The major averages fell to new lows ...

The Nasdaq slid 62.11 points or 0.4 percent to 14,283.91 and the S&P 500 fell 12.23 points or 0.3 percent to 4,576.73, but the Dow rose 71.15 points or 0.2 percent to 35,630.68, its best closing ...

Support Turned Resistance It's important to note that the $220 zone we're highlighting isn't just another round number on the chart. Throughout December and even into January, this level ...