Here are the ten most active Big Board issues at this time

Petroleo Brasileiro SA (Petrobras) up .650 10.050

Vale S.A. ADS rep 1 common up .635 7.755

CS Velocity Shs 3x Long Crude Oil ETN 2/ down .055 3.295

SPDR S&P 500 ETF Trust up .630 211.790

AT&T Inc up .030 34.260

Xerox Corp down 1.205 11.935

Bank of America Corp down .035 15.655

Petrobras ADS A rep 1 preferred share up .380 9.060

Molycorp Inc up .165 1.000

Itau Unibanco Holding SA ADS rep. 1 pf s up .570 13.250

The ten volume leaders on the NYSE MKT:

iBio Inc up .050 1.050

Uranium Energy Corp up .040 2.440

New Gold Inc down .130 3.170

Cel-Sci Corp up .135 1.030

Barclays Bank Ipath exch trd note lkd to

down .060 11.880

Ampio Pharmaceuticals Inc down .141 2.749

Organovo Holdings Inc up .180 5.250

Orchids Paper Products Co down 1.075 22.515

iShares MSCI India Index Fund down .590 30.410

Northern Oil & Gas Inc down .200 8.320

And the ten most active issues in Nasdaq trading:

Microsoft Corp up 4.240 47.580

Comcast Corp up .330 59.560

Apple Inc up .405 130.075

Facebook Inc down .415 81.995

PowerShares QQQ Trust Series I up 1.530 110.590

Cisco Systems up .045 28.720

Starbucks Corp up 2.420 51.850

Intel Corp down .175 32.175

American Airlines Group Inc up 1.950 53.400

Micron Technology Inc down .415 29.100