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U.S. Stock Options With Biggest Changes in Implied Volatility

By Bloomberg News - Sep 13, 2011

The following are the U.S. stock options that had the biggest percentage changes in implied volatility from the previous trading day as of 11:30 a.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 200 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
=============================================================================
HRBN   HARBIN ELEC  HRBN US 10/22/11 C10      25.6 106.8  10.00    0.0    417
SVM    SILVERCORP   SVM US 10/22/11 P3        20.8 270.3   0.40   66.7    458
ALU    ALCATEL-LUC  ALU US 01/21/12 C3        19.2  90.3   0.62   37.8  13712
SVM    SILVERCORP   SVM US 10/22/11 P4        17.6 254.9   0.70  100.0    478
SVM    SILVERCORP   SVM US 10/22/11 P6        15.6 224.0   1.50   66.7   2637
SVM    SILVERCORP   SVM US 10/22/11 P7        14.7 208.3   2.05   57.7   1173
SVM    SILVERCORP   SVM US 10/22/11 P5        14.2 232.0   1.10   83.3   1837
SVM    SILVERCORP   SVM US 10/22/11 C7        12.6 167.2   1.20  -33.3    307
AFFY   AFFYMAX INC  AFFY US 10/22/11 P4       11.7  84.3   0.15  -25.0    411

Top Volatility Decreases



                         Contract            %Chg  Impl.
Ticker    Name           Description          Vol.  Vol.   Price  %Chg  Volume
=============================================================================
NETL   NETLOGIC MI  NETL US 04/21/12 C50     -66.6   5.6   0.25  -16.7   3356
ADTN   ADTRAN INC   ADTN US 11/19/11 P32     -25.4  45.5   3.50  -36.4    380
QID    PROSHARES Q  QID US 10/22/11 C49      -25.1  56.8   6.05  -16.6    216
ADTN   ADTRAN INC   ADTN US 11/19/11 P31     -22.1  46.8   2.85   58.3    234
C      CITIGROUP I  C1 US 01/21/12 P5        -22.1  40.7   2.30   -1.3  10560
IO     ION GEOPHYS  IO US 10/22/11 P6        -17.4  76.0   0.45  -18.2    815
LVLT   LEVEL 3 COM  LVLT US 12/17/11 P1.5    -14.9  78.7   0.25    0.0   1222
LDK    LDK SOLAR C  LDK US 12/17/11 P5       -14.9 218.5   2.05  -19.6    542
XRA    EXETER RESO  XRA US 10/22/11 C5       -14.3  89.5   0.60  -20.0    727
BBY    BEST BUY CO  BBY US 10/22/11 C24      -13.3  47.1   0.90  -56.7   1389
WBC    WABCO HOLDI  WBC US 10/22/11 P45      -12.5  58.4   2.55  -31.1    310
BBY    BEST BUY CO  BBY US 10/22/11 P22      -12.3  51.2   1.15   59.7    805
BBY    BEST BUY CO  BBY US 10/22/11 C23      -12.2  49.3   1.34  -52.8    325
BBY    BEST BUY CO  BBY US 10/22/11 P21      -11.9  53.6   0.80   45.5   1927
SPWRB  SUNPOWER CO  SPWRB US 10/22/11 C11    -11.9  58.3   0.90  100.0    337
YGE    YINGLI GREE  YGE US 10/22/11 P4       -11.8  86.8   0.35  -12.5    311
CORN   TEUCRIUM CO  CORN US 10/22/11 P47     -11.7  34.0   1.65    0.0    429
OPTR   OPTIMER PHA  OPTR US 10/22/11 C12.5   -11.5  51.7   1.25   78.6    245
CLD    CLOUD PEAK   CLD US 11/19/11 P20      -11.3  44.8   1.55  -32.6    248
CORN   TEUCRIUM CO  CORN US 10/22/11 P48     -11.2  34.4   2.10    8.2    517
ROYL   ROYALE ENER  ROYL US 03/17/12 C2.5    -11.2  79.6   0.60  -22.1    200
ADTN   ADTRAN INC   ADTN US 11/19/11 P28     -11.0  51.1   1.55  -42.6    420
BBY    BEST BUY CO  BBY US 10/22/11 P20      -11.0  56.3   0.53   39.5   1036
BPAX   BIOSANTE PH  BPAX US 10/22/11 P2.5    -10.8  96.4   0.25  -10.7    292
XRA    EXETER RESO  XRA US 11/19/11 C5       -10.6  85.6   0.85    0.0    427
BBY    BEST BUY CO  BBY US 10/22/11 P19      -10.5  59.2   0.35   34.6    237
UUP    POWERSHARES  UUP US 10/22/11 C21      -10.3  12.4   0.93   -6.1    349
EWG    ISHARES-GER  EWG US 04/21/12 P17      -10.1  45.8   2.05  -10.9    260
GLD    SPDR GOLD T  GLD US 09/30/11 P177     -10.0  32.2   4.85  -20.1    209

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

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