Datalink (Nasdaq: DTLK) sprinted ahead 29.1 percent to $5.86, a three-year high. Volume of 1,649,908 shares trampled its full-day volume average of 35,395, on word DTLK raised its fourth-quarter outlook on increased demand for its storage products.

Verizon Communications Inc. (NYSE: VZ) was a volume leader Tuesday, trading in 41,815,258 shares, 2 ½ times its full-day average. Prices for the stock were down 3.1 percent to $34.36. VZ announced last week that it will begin selling Apple’s iPhone early next month.

Onstream Media Corporation (Nasdaq: ONSM) fell 14.3 percent to $1.08. Volume for the stock was 451,217 shares, towering over its all-day average of 78,272. ONSM is a leading online service provider of live and on-demand Internet broadcasting, corporate web communications and virtual marketplace technology.