The SV150 index of Silicon Valley's largest technology companies declined 0.6 percent in the first quarter of 2013, despite record-breaking runs by the Dow Jones industrial average and Standard & Poor's 500 in the same period. The performances of these 15 worst performers in the index hurt, but one in particular stood out: Apple's (AAPL) 17 percent decline had a much larger effect as its market cap is not only the largest in the SV150, but leads all public companies in the United States.

Below are the 15 worst performers for the first quarter, in order, with the percentage loss for the quarter.

VeriFone Systems, -30.3

Accuray, -27.8

Impax Laboratories, -24.6

Riverbed Technology, -24.4

Symmetricom, -21.3

Oclaro, -19.7

TeleNav, -19.2

Finisar, -19.1

Solta Medical, -17.6

Volterra Semiconductor, -17.3

Apple, -17.0

VMware, -16.2

Pericom Semiconductor, -15.2

Netgear, -15.0

ShoreTel, -14.4

Source: Bloomberg data



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