The following are the U.S. stock options that had the biggest percentage changes in implied volatility from the previous trading day as of 3:00 p.m. in New York. This {OSCH <GO>} search was limited to options that are more than 10 days from expiration, have trading volume of at least 500 contracts and have strike prices within 5 percent of the underlying security's price.

Top Volatility Increases

                         Contract            %Chg  Impl.
Ticker    Name           Description          Vol.  Vol.   Price  %Chg  Volume
=============================================================================
EXC    EXELON CORP  EXC US 06/16/12 C34       96.9  21.4   3.10    0.0    561
VXX    IPATH-S&P S  VXX US 06/16/12 C18       45.9  80.7   3.02    0.7    549
GNOM   COMPLETE GE  GNOM US 07/21/12 C2.5     41.4 155.2   0.75  114.3    896
QQQ    POWERSH-QQQ  QQQ US 06/16/12 P65       39.4  17.8   3.27   -9.2    940
ELN    ELAN CORP-A  ELN US 06/16/12 P13       38.7  55.5   0.25  -44.4    914
CIGX   STAR SCIENT  CIGX US 01/19/13 C2       36.3  51.5   1.95    2.6    570
CALL   MAGICJACK V  CALL US 12/22/12 C12.5    33.2  49.1   5.20   -8.8   3510
NILE   BLUE NILE I  NILE US 06/16/12 C25      30.3  62.2   7.60   20.6    592
IOC    INTEROIL CO  IOC US 06/16/12 P50       29.1 107.0   1.47   63.3    504
IOC    INTEROIL CO  IOC US 06/16/12 P55       28.2  99.5   2.15   15.6    556
IOC    INTEROIL CO  IOC US 06/16/12 C60       26.7  93.4   7.35   31.2    640
VXX    IPATH-S&P S  VXX US 06/16/12 C20       23.9  86.4   1.90    8.6   4950
IOC    INTEROIL CO  IOC US 06/16/12 P35       22.8 145.4   0.25   56.2    568
ARBA   ARIBA INC    ARBA US 06/16/12 C45      22.6   8.2   0.45   28.6   1243
IWM    ISHARES-RUS  IWM US 06/16/12 P80       20.9  22.5   4.04    8.0  10462
SPY    SPDR S&P 50  SPY US 06/16/12 P136      20.8  14.9   5.08   10.9   5503
ARBA   ARIBA INC    ARBA US 07/21/12 C45      20.6   6.8   0.55   10.0   5528
CIGX   STAR SCIENT  CIGX US 07/21/12 C4       20.4  40.0   0.20    0.0    550
HD     HOME DEPOT   HD US 06/16/12 C46        16.4  24.3   3.70   12.1   1513
VXX    IPATH-S&P S  VXX US 06/16/12 C21       16.2  89.1   1.48   11.3   1513
EEM    ISHARES-EMG  EEM US 06/22/13 P35       14.6  30.5   4.05    0.0    800
GRPN   GROUPON INC  GRPN US 06/16/12 C5       14.2 171.8   7.00    1.4    521
JNJ    JOHNSON&JOH  JNJ US 06/16/12 C65       13.5  12.4   0.08  -33.3    555
EEM    ISHARES-EMG  EEM US 12/22/12 P31       13.3  36.8   1.70   -5.6  10700
TIVO   TIVO INC     TIVO US 06/16/12 P9       13.2  64.0   0.50    4.2   1656
HPQ    HEWLETT-PAC  HPQ US 08/18/12 C14       13.0  58.0   8.21  -19.5   1207
ONXX   ONYX PHARM   ONXX US 06/16/12 P39      12.8  49.2   0.10  -33.3    772
QQQ    POWERSH-QQQ  QQQ US 06/16/12 P64       11.9  18.5   2.50   -2.7   1421
CIGX   STAR SCIENT  CIGX US 01/18/14 C4       11.2  59.4   1.05   -4.5    667
END    ENDEAVOUR I  END US 07/21/12 P5        11.1 124.2   0.60   20.0   1500
WNR    WESTERN REF  WNR US 06/16/12 P20       11.1  53.6   1.10   -6.0   1002
ENPH   ENPHASE ENE  ENPH US 11/17/12 P5       10.8  99.3   0.70    0.0    500
C      CITIGROUP I  C US 06/16/12 P15         10.7 104.3   0.02    0.0    623
DUK    DUKE ENERGY  DUK US 07/21/12 C22       10.6  13.5   0.45   28.6   2649

Top Volatility Decreases

                         Contract            %Chg  Impl.
Ticker    Name           Description          Vol.  Vol.   Price  %Chg  Volume
=============================================================================
PAY    VERIFONE SY  PAY US 06/16/12 C38      -38.5  46.4   2.00    0.0    715
PAY    VERIFONE SY  PAY US 06/16/12 P37      -37.3  46.6   1.05  110.0   1065
PAY    VERIFONE SY  PAY US 06/16/12 C39      -37.2  45.8   1.35  -81.5    988
PAY    VERIFONE SY  PAY US 06/16/12 P38      -34.8  46.0   1.62  170.0   1822
PAY    VERIFONE SY  PAY US 06/16/12 P36      -34.3  48.8   0.90  157.1   2682
PAY    VERIFONE SY  PAY US 06/16/12 P39      -34.2  45.9   2.14  167.5   1159
PAY    VERIFONE SY  PAY US 06/16/12 P40      -33.9  45.5   2.75  175.0   2642
PAY    VERIFONE SY  PAY US 06/16/12 P35      -33.3  49.9   0.55   83.3    624
PAY    VERIFONE SY  PAY US 06/16/12 C40      -31.2  45.6   0.95  -85.4   1433
KMI    KINDER MORG  KMI US 06/16/12 C32.5    -24.8  27.5   0.75  -25.0   1774
JAKK   JAKKS PACIF  JAKK US 06/16/12 P17.5   -23.1  25.3   0.30  -40.0    961
AMLN   AMYLIN PHAR  AMLN US 07/21/12 C28     -22.7  51.5   2.33   33.1   1713
AMLN   AMYLIN PHAR  AMLN US 07/21/12 C27     -21.9  55.7   2.80   26.7   1169
PAY    VERIFONE SY  PAY US 07/21/12 P32      -21.3  53.0   0.80  166.7   2041
AMLN   AMYLIN PHAR  AMLN US 06/16/12 P24     -20.5  63.8   0.30  -76.0   1337
AMLN   AMYLIN PHAR  AMLN US 06/16/12 P25     -20.3  60.0   0.49  -71.2   1246
AMLN   AMYLIN PHAR  AMLN US 07/21/12 P29     -20.0  49.9   2.80  -40.4   1185
AMLN   AMYLIN PHAR  AMLN US 06/16/12 C26     -19.8  59.5   2.62   49.7   1875
EC     ECOPETROL-S  EC US 06/16/12 P60       -19.6  26.7   3.20    6.7    629
PAY    VERIFONE SY  PAY US 07/21/12 P40      -19.3  45.1   3.83  112.8    541
AMLN   AMYLIN PHAR  AMLN US 07/21/12 P18     -18.3  96.3   0.65  -44.4   1085
AMLN   AMYLIN PHAR  AMLN US 06/16/12 C28     -18.2  57.3   1.40   55.6   3438
AMLN   AMYLIN PHAR  AMLN US 06/16/12 C27     -18.2  60.0   2.06   77.6   1191
AMLN   AMYLIN PHAR  AMLN US 07/21/12 P20     -17.6  89.6   0.73  -52.9    671
DVA    DAVITA INC   DVA US 06/16/12 P80      -16.5  20.6   0.85  -29.2   1383
SMH    MARKET VECT  SMH US 06/16/12 C32      -16.5  21.8   0.35  -12.5    763
FRO    FRONTLINE L  FRO US 07/21/12 P5       -15.2  78.4   0.45  -30.8    922
ADTN   ADTRAN INC   ADTN US 06/16/12 C30     -15.2  33.3   0.90  -10.0   1113
VVUS   VIVUS INC    VVUS US 06/16/12 C25     -14.9  54.7   1.10  -22.0  10389
UUP    POWERSHARES  UUP US 06/16/12 C22      -14.8   6.9   0.79   -2.5    699
SPF    STANDARD PA  SPF US 06/16/12 P5       -14.2  70.8   0.15  -40.0   1500
FRO    FRONTLINE L  FRO US 08/18/12 C5       -14.1  70.4   1.10   46.7    634
XLF    SPDR-FINL S  XLF US 06/16/12 C13      -13.3  34.0   1.13   -3.4   3801
QQQ    POWERSH-QQQ  QQQ US 06/16/12 C60      -12.8  23.7   2.65   -9.2   1538
SPY    SPDR S&P 50  SPY US 06/16/12 C127     -12.4  21.4   5.94   -3.7    584
SPF    STANDARD PA  SPF US 06/16/12 C5       -12.3  63.0   0.55    0.0    703
PAG    PENSKE AUTO  PAG US 06/16/12 C25      -12.2  29.5   0.70   27.3    667
GNK    GENCO SHIPP  GNK US 06/16/12 C3       -12.1  74.8   0.34   36.0    515
KMI    KINDER MORG  KMI US 06/16/12 P30      -12.0  35.5   0.35  -12.5   2262
CMCSK  COMCAST COR  CMCSK US 06/16/12 P29    -11.8  20.5   0.70  -30.0   3004
QQQ    POWERSH-QQQ  QQQ US 06/16/12 C61      -11.6  22.5   1.89  -12.9   1964
FXY    CRYSHS-JAPA  FXY US 06/16/12 C129     -11.4  10.4   0.03  -82.3   2365
SPY    SPDR S&P 50  SPY US 06/16/12 C128     -11.3  20.8   5.12  -11.0    978
IWM    ISHARES-RUS  IWM US 06/16/12 C75      -11.2  27.1   2.80  -10.0   1659
SYY    SYSCO CORP   SYY US 06/16/12 P27      -11.2  16.6   0.10  -60.0   1171
EXPD   EXPEDITORS   EXPD US 06/16/12 P37.5   -11.2  26.6   0.65  -13.3    590
AMLN   AMYLIN PHAR  AMLN US 06/16/12 C29     -11.0  60.0   1.10   52.8   1563
TTWO   TAKE-TWO IN  TTWO US 07/21/12 P12     -11.0  40.2   1.05    0.0   2500
SPY    SPDR S&P 50  SPY US 06/16/12 C129     -10.7  20.2   4.35   -8.2   2254
IWM    ISHARES-RUS  IWM US 06/16/12 C76      -10.7  25.9   2.16  -10.0   3308
QCOR   QUESTCOR PH  QCOR US 06/16/12 P38     -10.4  58.8   0.91  -37.2   1433
ISTA   ISTA PHARMA  ISTA US 10/20/12 P7.5    -10.3  22.7   0.05    0.0    510
PAY    VERIFONE SY  PAY US 10/20/12 P40      -10.1  46.9   5.40   63.6   3803
IDIX   IDENIX PHAR  IDIX US 07/21/12 P7.5    -10.0  96.4   0.50   -9.1   9152

x - Ex-dividend. * - Ex-earnings.

-- Bloomberg News

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