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
=============================================================================
TZA    DIR SMCAP B  TZA US 08/18/12 C16       39.9  57.9   4.25   28.8   1011
HZNP   HORIZON PHA  HZNP US 08/18/12 C7.5     26.1 121.9   1.00   11.1    758
NAT    NORDIC AMER  NAT US 10/20/12 P10       24.3  59.7   0.65   62.5   1630
D      DOMINION RE  D US 09/22/12 C55         22.8  11.6   0.15  -57.1    500
XLF    SPDR-FINL S  XLF US 08/18/12 C13       22.6  31.0   1.20   -9.1    979
NKTR   NEKTAR THER  NKTR US 08/18/12 C9       20.9  64.2   0.60  -14.3   2734
RRD    RR DONNELLE  RRD US 01/19/13 C12.5     19.3  33.7   0.80   14.3    895
AUTH   AUTHENTEC I  AUTH US 10/20/12 C5       18.0  90.6   0.95   26.7   3255
KORS   MICHAEL KOR  KORS US 08/18/12 P39      17.9  70.0   2.50   13.6   1454
MWE    MARKWEST EN  MWE US 08/18/12 C52.5     17.9  25.6   1.05  -19.9    598
BWLD   BUFFALO WIL  BWLD US 08/18/12 P70      17.5  72.4   2.31   71.1    583
CMCSA  COMCAST COR  CMCSA US 08/18/12 P32     17.5  25.2   1.26   20.0   5703
KORS   MICHAEL KOR  KORS US 08/18/12 P38      16.7  71.1   2.10   13.5    669
JNPR   JUNIPER NET  JNPR US 08/18/12 P14      16.2  63.3   0.59   68.6  19500
BWLD   BUFFALO WIL  BWLD US 08/18/12 C80      16.2  62.5   4.07  -16.9   1282
KORS   MICHAEL KOR  KORS US 08/18/12 C41      16.0  66.4   2.00    2.6    971
LLY    ELI LILLY &  LLY US 08/18/12 P43       15.8  27.3   2.16  140.0   1051
JNPR   JUNIPER NET  JNPR US 08/18/12 P13      15.7  66.9   0.30   57.9    881
YNDX   YANDEX NV-A  YNDX US 08/18/12 P19      15.7  62.9   1.45   45.0   1635
JNPR   JUNIPER NET  JNPR US 08/18/12 C15      15.3  61.0   0.89   -9.2   3805
YHOO   YAHOO! INC   YHOO US 08/18/12 C16      14.9  22.6   0.12  -47.8   4556
BWLD   BUFFALO WIL  BWLD US 09/22/12 C80      14.9  48.6   5.30   -7.0    539
EXC    EXELON CORP  EXC US 10/20/12 C40       14.7  16.9   0.60   -3.2   1443
LLY    ELI LILLY &  LLY US 08/18/12 C43       14.7  27.0   0.62  -59.7    841
FRX    FOREST LABS  FRX US 08/18/12 C35       14.6  28.9   0.46  -29.2   1168
BWLD   BUFFALO WIL  BWLD US 08/18/12 P80      14.5  62.0   6.10   48.8   1605
BWLD   BUFFALO WIL  BWLD US 09/22/12 P80      14.5  49.0   7.21   38.6    882
CAH    CARDINAL HE  CAH US 08/18/12 C44       14.2  21.7   0.25  -16.7    924
CMCSA  COMCAST COR  CMCSA US 08/18/12 C31     14.2  26.9   0.97    0.0   2370
GLW    CORNING INC  GLW US 08/18/12 P12       14.1  39.9   0.48   26.3   4529
XLF    SPDR-FINL S  XLF US 08/18/12 C14       13.8  24.0   0.41  -12.8   3496
GLW    CORNING INC  GLW US 08/18/12 C12       13.7  39.4   0.48   -5.9   5854
YHOO   YAHOO! INC   YHOO US 08/18/12 P16      13.7  22.0   0.77   75.0    772
CMCSA  COMCAST COR  CMCSA US 08/18/12 P31     13.6  26.8   0.73   19.7   2495
CCL    CARNIVAL CO  CCL US 08/18/12 C33       13.5  25.9   0.37  -26.0    563
DNDN   DENDREON CO  DNDN US 08/18/12 P6       13.4 122.6   0.57   -3.4   2127
DNDN   DENDREON CO  DNDN US 09/22/12 P6       13.4 106.8   0.86    4.9   2975
VXX    IPATH-S&P S  VXX US 08/18/12 P13       13.2  81.3   0.45  -22.4   7901
CCL    CARNIVAL CO  CCL US 09/22/12 C32       13.1  27.8   1.40    0.0   6707
WMB    WILLIAMS CO  WMB US 08/18/12 C32       13.1  33.6   0.49  -31.9   1977
QQQ    POWERSH-QQQ  QQQ US 08/18/12 C65       13.0  18.5   0.40  -21.6   6335
QQQ    POWERSH-QQQ  QQQ US 08/18/12 C64       12.7  19.7   0.74  -19.6   8451
BWLD   BUFFALO WIL  BWLD US 08/18/12 P75      12.6  66.3   3.80   55.1    792
JNJ    JOHNSON&JOH  JNJ US 08/18/12 C70       12.5  13.6   0.13  -48.0    915
DIA    SPDR DJIA T  DIA US 08/18/12 C131      12.4  13.1   0.17  -46.9    696
QQQ    POWERSH-QQQ  QQQ US 08/18/12 C63       12.2  20.8   1.22  -19.7  17310
CCL    CARNIVAL CO  CCL US 08/18/12 P31       12.2  29.6   0.60   71.4   2653
BWLD   BUFFALO WIL  BWLD US 09/22/12 P65      12.1  57.6   1.75   59.1    776
WMS    WMS INDS IN  WMS US 08/18/12 P20       12.1  58.3   1.35   12.5    647
VXX    IPATH-S&P S  VXX US 08/18/12 P12       12.1  77.4   0.19  -20.8  26888
VXX    IPATH-S&P S  VXX US 12/22/12 P10       12.0  79.1   0.75  -11.8    906
BX     BLACKSTONE   BX US 08/18/12 C14        11.9  27.2   0.32   60.0   2361
DIA    SPDR DJIA T  DIA US 08/18/12 C125      11.9  16.5   2.17  -34.2   1112
VXX    IPATH-S&P S  VXX US 08/18/12 C13       11.8  81.0   2.32   38.1  13060
VXX    IPATH-S&P S  VXX US 08/18/12 P14       11.8  84.9   0.85  -24.8   2621
LINE   LINN ENERGY  LINE US 08/18/12 P36      11.7  28.6   0.20  100.0    548
DIA    SPDR DJIA T  DIA US 08/18/12 C126      11.7  15.9   1.67  -32.4   3149
ETP    ENERGY TRAN  ETP US 08/18/12 C45       11.7  21.5   0.50  -37.5    749
DIA    SPDR DJIA T  DIA US 08/18/12 C130      11.6  13.4   0.30  -46.4   1159
QQQ    POWERSH-QQQ  QQQ US 08/18/12 C62       11.6  22.1   1.82  -17.6   4932
CPB    CAMPBELL SO  CPB US 09/22/12 P31       11.5  20.0   0.45    0.0    978
DIA    SPDR DJIA T  DIA US 08/18/12 C127      11.4  15.1   1.19  -32.8   1736
QQQ    POWERSH-QQQ  QQQ US 08/18/12 C60       11.3  24.5   3.28  -15.7    748
FRX    FOREST LABS  FRX US 08/18/12 P34       11.3  28.5   1.15   51.3    536
QQQ    POWERSH-QQQ  QQQ US 08/18/12 C61       11.2  23.2   2.51  -15.5    964
XLE    SPDR-ENERGY  XLE US 09/22/12 C62.5     11.1  27.8   5.15   -1.9   5218
DIA    SPDR DJIA T  DIA US 08/18/12 C129      11.1  13.8   0.48  -45.5    811
LLY    ELI LILLY &  LLY US 08/18/12 P42       11.1  26.5   1.46  192.0   1802
EXC    EXELON CORP  EXC US 08/18/12 C39       11.0  15.3   0.50  -23.1   1007
DIA    SPDR DJIA T  DIA US 08/18/12 C128      10.9  14.4   0.79  -39.2   2021
CSX    CSX CORP     CSX US 09/22/12 C22.5     10.9  23.7   0.41  -19.6    632
PNRA   PANERA BREA  PNRA US 08/18/12 P125     10.7  61.4   2.70   42.1    843
DIA    SPDR DJIA T  DIA US 10/20/12 C126      10.7  17.0   3.60  -17.2    624
VXX    IPATH-S&P S  VXX US 08/18/12 P15       10.4  89.0   1.41  -20.3   1670
SDS    PRO ULTSHRT  SDS US 08/18/12 P15       10.3  32.2   0.11  -42.1    708
RBN    ROBBINS & M  RBN US 08/18/12 C40       10.0  47.6   4.35   40.3    530

Top Volatility Decreases

                         Contract            %Chg  Impl.
Ticker    Name           Description          Vol.  Vol.   Price  %Chg  Volume
=============================================================================
WAT    WATERS CORP  WAT US 08/18/12 P75      -37.0  25.4   1.50  -49.1   3397
ELN    ELAN CORP-A  ELN US 08/18/12 P10      -33.5  93.7   0.45    0.0    509
ELN    ELAN CORP-A  ELN US 08/18/12 P11      -33.5  91.5   0.80    1.3   2721
UA     UNDER ARMOU  UA US 08/18/12 P47.5     -31.5  46.5   0.85  -72.6  10664
GNTX   GENTEX CORP  GNTX US 08/18/12 C15     -31.3  53.2   0.95    0.0    747
UA     UNDER ARMOU  UA US 08/18/12 P48.75    -30.9  45.3   1.10  -68.6   1014
UA     UNDER ARMOU  UA US 08/18/12 C52.5     -30.9  41.4   1.92   29.7   1706
UA     UNDER ARMOU  UA US 08/18/12 P50       -30.0  43.4   1.50  -63.4   3463
UA     UNDER ARMOU  UA US 08/18/12 P52.5     -29.5  41.0   2.50  -52.8    929
GNTX   GENTEX CORP  GNTX US 08/18/12 P15     -29.1  52.2   0.80    0.0   1026
UA     UNDER ARMOU  UA US 08/18/12 P42.5     -28.8  54.3   0.25  -81.5   1402
GNTX   GENTEX CORP  GNTX US 09/22/12 P15     -27.9  46.4   1.15 1050.0    801
UA     UNDER ARMOU  UA US 08/18/12 P46.25    -27.5  48.8   0.55  -77.4    622
PII    POLARIS IND  PII US 08/18/12 P70      -27.4  34.7   2.60  -10.7   2208
UA     UNDER ARMOU  UA US 08/18/12 P45       -27.3  51.5   0.40  -81.0   1059
ELN    ELAN CORP-A  ELN US 08/18/12 C12      -26.3 103.3   1.00  -58.3   2345
WAT    WATERS CORP  WAT US 08/18/12 P70      -26.3  29.9   0.50  -54.5   2216
WHR    WHIRLPOOL C  WHR US 08/18/12 P60      -25.6  42.7   1.68   40.0    846
WU     WESTERN UNI  WU US 08/18/12 P17       -25.4  21.2   0.25  -58.3    781
UA     UNDER ARMOU  UA US 08/18/12 P43.75    -25.3  53.5   0.20  -87.9    676
VXX    IPATH-S&P S  VXX US 08/18/12 P10      -25.3  74.0   0.01  -66.7   1749
BIDU   BAIDU INC-S  BIDU US 08/18/12 P120    -25.1  38.3   6.95  -52.4   1161
ELN    ELAN CORP-A  ELN US 08/18/12 P12      -24.8 102.1   1.50   26.1   1729
WHR    WHIRLPOOL C  WHR US 08/18/12 C65      -24.3  39.7   1.46  -70.3    797
WHR    WHIRLPOOL C  WHR US 08/18/12 P65      -24.1  39.4   4.15   56.0    524
WU     WESTERN UNI  WU US 08/18/12 C17       -23.8  21.2   0.53   32.5   1111
BIDU   BAIDU INC-S  BIDU US 08/18/12 C115    -22.4  40.4   5.30   87.3   6781
BIDU   BAIDU INC-S  BIDU US 08/18/12 P110    -22.0  42.3   2.50  -67.5   2420
ELN    ELAN CORP-A  ELN US 08/18/12 C10      -21.1  96.7   2.10  -54.7   2041
BIDU   BAIDU INC-S  BIDU US 08/18/12 C110    -20.2  42.7   8.30   74.7   5523
BIDU   BAIDU INC-S  BIDU US 08/18/12 P105    -20.0  44.8   1.40  -73.2   2939
TXN    TEXAS INSTR  TXN US 08/18/12 C27      -18.9  28.1   0.50  -35.9   1617
NXY    NEXEN INC    NXY US 09/22/12 P26      -18.7   9.5   0.50   11.1   4970
BIDU   BAIDU INC-S  BIDU US 08/18/12 C105    -17.9  45.3  12.20   70.6   1470
TXN    TEXAS INSTR  TXN US 08/18/12 P26      -17.5  30.1   0.65   -9.7   1719
BIDU   BAIDU INC-S  BIDU US 08/18/12 P100    -16.6  48.0   0.76  -77.3   2720
ELN    ELAN CORP-A  ELN US 09/22/12 C12      -16.3  97.0   1.80  -48.6    620
VMW    VMWARE INC-  VMW US 08/18/12 C90      -16.2  41.4   2.85  -35.2   5311
VMW    VMWARE INC-  VMW US 08/18/12 P87.5    -16.0  41.3   3.60   -7.7    543
ELN    ELAN CORP-A  ELN US 10/20/12 P12      -16.0  85.4   2.15   19.4   6687
VMW    VMWARE INC-  VMW US 08/18/12 P85      -15.9  41.8   2.35  -13.0    580
VMW    VMWARE INC-  VMW US 08/18/12 C87.5    -15.4  41.2   4.00  -25.9    504
UPS    UNITED PARC  UPS US 08/18/12 C72.5    -15.3  18.0   2.39  -65.8    804
ITW    ILLINOIS TO  ITW US 08/18/12 C52.5    -15.1  24.2   1.08  -43.2    906
IRDM   IRIDIUM COM  IRDM US 08/18/12 P7.5    -15.0  65.6   0.15    0.0   1211
EMC    EMC CORP/MA  EMC US 08/18/12 C26      -14.8  27.2   0.35  -10.3   3437
UPS    UNITED PARC  UPS US 08/18/12 C75      -14.8  16.1   0.89  -73.0   2290
EMC    EMC CORP/MA  EMC US 08/18/12 P25      -14.7  28.9   0.72  -25.8    745
ITW    ILLINOIS TO  ITW US 08/18/12 P52.5    -14.3  24.3   1.70   54.5    728
BIDU   BAIDU INC-S  BIDU US 09/22/12 P120    -14.2  38.6   9.50  -41.5   1428
EMC    EMC CORP/MA  EMC US 08/18/12 C25      -14.1  28.7   0.78   -2.5   1147
BTU    PEABODY ENE  BTU US 08/18/12 C18      -13.8  68.6   2.84  -40.2   1657
BIDU   BAIDU INC-S  BIDU US 08/18/12 C100    -13.5  49.2  16.35   58.9   1035
EMC    EMC CORP/MA  EMC US 08/18/12 P24      -13.5  31.4   0.38  -30.9    738
S      SPRINT NEXT  S US 08/18/12 P3         -13.4  55.9   0.05    0.0    802
BTU    PEABODY ENE  BTU US 08/18/12 P18      -13.4  67.7   0.44  100.0    579
T      AT&T INC     T US 08/18/12 P34        -13.2  17.4   0.42   90.9   2452
UA     UNDER ARMOU  UA US 08/18/12 P37.5     -12.9  71.5   0.10  -81.8    807
BIDU   BAIDU INC-S  BIDU US 09/22/12 P115    -12.8  39.7   7.00  -41.9    749
BIDU   BAIDU INC-S  BIDU US 08/18/12 P95     -12.8  51.7   0.42  -78.9   1304
ELN    ELAN CORP-A  ELN US 01/19/13 P10      -12.7  68.7   1.20   14.3  10011
BIDU   BAIDU INC-S  BIDU US 09/22/12 C120    -12.7  39.1   5.50   61.8   1179
T      AT&T INC     T US 08/18/12 P35        -12.7  16.1   0.89   78.0   3468
UPS    UNITED PARC  UPS US 08/18/12 C77.5    -12.4  14.7   0.19  -88.0   3814
VVUS   VIVUS INC    VVUS US 08/18/12 C24     -12.3  73.0   1.45   16.9    600
MO     ALTRIA GROU  MO US 08/18/12 C36       -12.2  12.9   0.27  -18.2   1508
EMC    EMC CORP/MA  EMC US 08/18/12 P23      -12.1  35.1   0.20  -41.2    913
VVUS   VIVUS INC    VVUS US 08/18/12 P16     -12.1 100.3   0.18  -53.9    555
VIAB   VIACOM INC-  VIAB US 08/18/12 P47     -12.0  24.1   2.25  -11.8   5246
VVUS   VIVUS INC    VVUS US 08/18/12 C21     -12.0  79.8   3.07   11.2    789
FB     FACEBOOK IN  FB US 08/18/12 P28       -11.9  69.8   1.80   -7.7   3553
UPS    UNITED PARC  UPS US 08/18/12 P70      -11.9  23.2   0.36   71.4   1115
BIDU   BAIDU INC-S  BIDU US 09/22/12 C115    -11.8  40.2   7.95   65.6    916
NXY    NEXEN INC    NXY US 09/22/12 C26      -11.6  10.5   0.40  -11.1   1043
VVUS   VIVUS INC    VVUS US 08/18/12 P17     -11.5  95.8   0.29  -45.3   2979
T      AT&T INC     T US 08/18/12 C34        -11.4  17.7   0.84  -49.4   2460
OGZPY  GAZPROM-ADR  GAZ GR 09/21/12 P7.8     -11.4  39.2   0.17    0.0    790
UPS    UNITED PARC  UPS US 08/18/12 P72.5    -11.4  21.5   0.87  180.7   3174
T      AT&T INC     T US 08/18/12 C35        -11.3  16.1   0.32  -64.4   3812
FB     FACEBOOK IN  FB US 08/18/12 P26       -11.1  71.6   1.00  -13.0   1800
BTU    PEABODY ENE  BTU US 08/18/12 P19      -11.0  64.3   0.69  130.0   1215
MO     ALTRIA GROU  MO US 08/18/12 P35       -11.0  14.0   0.30  -18.9    613
ITW    ILLINOIS TO  ITW US 08/18/12 P50      -10.9  27.5   0.70   45.8    763
XLI    SPDR-INDU S  XLI US 09/22/12 P36      -10.8  19.4   2.03   23.0   1000
BTU    PEABODY ENE  BTU US 08/18/12 C20      -10.7  61.6   1.46  -57.1   1142
FB     FACEBOOK IN  FB US 08/18/12 P25       -10.6  72.9   0.72  -17.2  12260
T      AT&T INC     T US 08/18/12 P31        -10.6  23.8   0.04  100.0    588
FB     FACEBOOK IN  FB US 08/18/12 P27       -10.5  70.0   1.33  -11.3   2341
VVUS   VIVUS INC    VVUS US 08/18/12 P18     -10.5  90.2   0.38  -44.1    637
ELN    ELAN CORP-A  ELN US 01/19/13 C7.5     -10.3  69.5   4.70  -27.7   1003
T      AT&T INC     T US 08/18/12 P33        -10.3  19.4   0.21  110.0   1016
FB     FACEBOOK IN  FB US 08/18/12 P23       -10.2  76.5   0.35  -22.2    751
VVUS   VIVUS INC    VVUS US 08/18/12 P19     -10.2  88.0   0.55  -38.2    820

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

-- Bloomberg News

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