NOTE: In the news release, "CBOE Holdings Reports March 2015 Trading Volume," issued April 1, 2015 by CBOE Holdings, Inc. over PR Newswire, the company advised PR Newswire that the table in the last section -- "CBOE Holdings Average Revenue Per Contract" -- contained an incorrect number. In the "Total Options Average Revenue Per Contract" line, the February 2015 figure has been changed from "$0.264" to "$0.283." The complete, corrected release follows:

CBOE Holdings Reports March 2015 Trading Volume

- Total Volume of 94.9 Million Contracts Traded

- ADV of 4.3 Million Contacts Down From Prior Month, Year Ago

CHICAGO, April 1, 2015 /PRNewswire/ -- CBOE Holdings, Inc. (NASDAQ: CBOE) reported today that total trading volume during March for options contracts on Chicago Board Options Exchange(®) (CBOE(®)) and C2 Options Exchange(SM) (C2(SM)) and futures contracts on CBOE Futures Exchange (CFE(®)) was 94.9 million contracts, an increase of seven percent versus February 2015 and a decrease of 12 percent from March 2014.

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Total options and futures average daily volume (ADV) at CBOE Holdings during March was 4.3 million contracts, a decrease of seven percent from February 2015 and a decrease of 16 percent from March 2014.



                              CBOE Holdings Consolidated Trading Volume                                             Year-To-Date
                              =========================================                                             ============

    (Contracts in thousands) Mar 2015                           Mar               % Chg      Feb          % Chg            Mar             Mar           % Chg

                                                                            2014                    2015                             2015          2014
    ===                                                                     ====                    ====                             ====          ====

    Trading Days                             22                                21                      19                               61            61
    ------------                            ---                               ---                     ---                              ---           ---

    Total Contracts                    94,937.1                         107,862.8       -12%     88,507.4        7%              290,684.3     342,817.3       -15%

    (options & futures)
    ------------------

    Total Options Contracts            91,248.7                         104,001.7       -12%     85,340.9        7%              279,255.7     330,425.6       -15%

    (CBOE & C2)
    ----------

    Total Futures Contracts             3,688.4                           3,861.1        -4%      3,166.5       16%               11,428.6      12,391.7        -8%

    (CFE)


    Total ADV                           4,315.4                           5,136.4       -16%      4,658.3       -7%                4,765.4       5,620.9       -15%

    (options & futures)
    ------------------

    Total Options ADV                   4,147.7                           4,952.5       -16%      4,491.6       -8%                4,578.0       5,416.8       -15%

    (CBOE & C2)


    Total Futures ADV                     167.7                             183.9        -9%        166.7        1%                  187.4         203.1        -8%

    (CFE)
    ====

CBOE Trading Volume and Market Share

CBOE Volume: March


    --  CBOE's ADV during the month was 3.8 million contracts, down eight
        percent from February 2015 and down 18 percent from March 2014. 
        Exchange-wide trading volume totaled 84.4 million contracts, an increase
        of six percent from the previous month and a decline of 15 percent from
        a year ago.
    --  During the month, ADV in exchange-traded product (ETP) options increased
        two percent, index options declined eight percent and equity options
        declined 14 percent from February 2015.
    --  Expanded volume information for CBOE index and ETP options is available
        at: www.cboe.com/data/monthlyvolume.aspx.


                               CBOE Trading Volume Current Month                                                 Year-To-Date
                               =================================                                                 ============

    (contracts in thousands) Mar                            Mar           % Chg      Feb           % Chg                Mar               Mar             % Chg

                                        2015                         2014                    2015                                  2015            2014
    ===                                 ====                         ====                    ====                                  ====            ====

    Trading Days                          22                           21                      19                                    61              61
    ------------                         ---                          ---                     ---                                   ---             ---

    Total Exchange                  84,445.3                     98,820.4       -15%     79,692.6            6%               259,654.0       312,424.6         -17%
    --------------                                                                                       ---

    Total Exchange ADV               3,838.4                      4,705.7       -18%      4,194.3           -8%                 4,256.6         5,121.7         -17%
    ------------------

    Equity Options                  33,439.1                     40,864.1       -18%     33,769.4           -1%               104,671.8       129,833.2         -19%
    --------------                  --------                     --------        ---      --------           ---                ---------       ---------          ---

    Equity Options ADV               1,520.0                      1,945.9       -22%      1,777.3          -14%                 1,715.9         2,128.4         -19%
    ------------------               -------                      -------        ---       -------           ---                  -------         -------          ---

    Index Options                   27,682.4                     32,773.9       -16%     26,125.8            6%                85,159.8       106,583.5         -20%
    -------------                   --------                     --------        ---      --------           ---                 --------       ---------          ---

    Index Options ADV                1,258.3                      1,560.7       -19%      1,375.0           -8%                 1,396.1         1,747.3         -20%
    -----------------                -------                      -------        ---       -------           ---                  -------         -------          ---

    ETP Options                     23,323.8                     25,182.5        -7%     19,797.3           18%                69,822.3        76,007.8          -8%
    -----------                     --------                     --------        ---      --------           ---                 --------        --------          ---

    ETP Options ADV                  1,060.2                      1,199.2       -12%      1,042.0            2%                 1,144.6         1,246.0          -8%
    ===============                  =======                      =======        ===       =======           ===                  =======         =======          ===

CBOE Market Share: March


    --  CBOE's market share of total U.S. options industry volume was 25.1
        percent in March 2015, a decrease of 1.2 percentage points from February
        2015 and a decrease of 2.7 percentage points from March 2014.


                                CBOE Market Share Current Month                                                   Year-To-Date
                                ===============================                                                   ============

                   Mar 2015               Mar 2014             % Pt. Chg       Feb 2015          % Pt. Chg             Mar 2015            Mar 2014            % Pt. Chg
                   ========               ========             =========       ========          =========             ========            ========            =========

    Total Exchange          25.1%                  27.8%               -2.7%            26.3%            -1.2%                  26.2%               28.7%              -2.5%
    --------------           ----                    ----                 ----              ----              ----                    ----                ----               ----

    Equity Options          18.6%                  21.1%               -2.5%            19.3%            -0.7%                  19.1%               21.4%              -2.3%
    --------------           ----                    ----                 ----              ----              ----                    ----                ----               ----

    Index Options           96.0%                  96.6%               -0.6%            95.8%             0.2%                  96.0%               97.1%              -1.1%
    -------------            ----                    ----                 ----              ----               ---                    ----                ----               ----

    ETP Options             18.2%                  19.7%               -1.5%            19.7%            -1.5%                  19.6%               20.4%              -0.8%
    ===========              ====                    ====                 ====              ====              ====                    ====                ====               ====

C2 Trading Volume and Market Share

C2 Volume: March


    --  C2's March trading volume totaled 6.8 million contracts, up 20 percent
        from February 2015 and up 31 percent from March 2014.  ADV was 309,244
        contracts, a four-percent increase from February 2015 and a 25-percent
        increase from March 2014.


                                C2 Trading Volume Current Month                                                 Year-To-Date
                                ===============================                                                 ============

    (contracts in thousands) Mar 2015                    Mar 2014         % Chg      Feb          % Chg                 Mar             Mar            % Chg

                                                                                          2015                                 2015           2014
    ===                                                                                   ====                                 ====           ====

    Trading Days                           22                          21                     19                                   61             61
    ------------                          ---                         ---                    ---                                  ---            ---

    Total Exchange                    6,803.4                     5,181.2        31%     5,648.3           20%               19,601.7       18,001.0           9%
    --------------                                                                                      ---

    Total Exchange ADV                  309.2                       246.7        25%       297.3            4%                  321.3          295.1           9%
    ------------------

    Equity Options                    1,923.0                       739.0       160%     1,823.3            5%                5,618.5        2,237.6         151%
    --------------                    -------                       -----        ---      -------           ---                 -------        -------          ---

    Equity Options ADV                   87.4                        35.2       148%        96.0           -9%                   92.1           36.7         151%
    ------------------                   ----                        ----        ---         ----           ---                    ----           ----          ---

    Index Options                        72.5                        36.5        98%        43.3           67%                  182.7          106.0          72%
    -------------                        ----                        ----        ---         ----           ---                   -----          -----          ---

    Index Options ADV                     3.3                         1.7        89%         2.3           44%                    3.0            1.7          72%
    -----------------                     ---                         ---        ---          ---           ---                     ---            ---          ---

    ETP Options                       4,807.8                     4,405.7         9%     3,781.7           27%               13,800.5       15,657.3         -12%
    -----------                       -------                     -------        ---      -------           ---                --------       --------          ---

    ETP Options ADV                     218.5                       209.8         4%       199.0           10%                  226.2          256.7         -12%
    ===============                     =====                       =====        ===        =====           ===                   =====          =====          ===

C2 Market Share: March


    --  C2 market share of total industry volume in March 2015 was 2.0 percent,
        up 0.1 of a percentage point from February 2015 and a gain of 0.5 of a
        percentage point from March 2014.


                             C2  Market Share Current Month                                               Year-To-Date
                             ==============================                                               ============

                   Mar 2015            Mar 2014           % Pt. Chg       Feb 2015        % Pt. Chg            Mar 2015         Mar 2014         % Pt. Chg
                   ========            ========           =========       ========        =========            ========         ========         =========

    Total Exchange         2.0%                1.5%                0.5%           1.9%             0.1%                2.0%             1.7%              0.3%
    --------------          ---                  ---                  ---             ---               ---                 ---              ---                ---

    Equity Options         1.1%                0.4%                0.7%           1.0%             0.1%                1.0%             0.4%              0.6%
    --------------          ---                  ---                  ---             ---               ---                 ---              ---                ---

    Index Options          0.3%                0.1%                0.2%           0.2%             0.1%                0.2%             0.1%              0.1%
    -------------           ---                  ---                  ---             ---               ---                 ---              ---                ---

    ETP Options            3.7%                3.4%                0.3%           3.8%            -0.1%                3.9%             4.2%             -0.3%
    ===========             ===                  ===                  ===             ===              ====                 ===              ===               ====

CBOE Futures Exchange (CFE) Trading Volume

CFE Volume: March


    --  March exchange-wide ADV at CFE was 167,656 contracts, a one-percent
        increase from February 2015 and a nine-percent decrease from March 2014.
        Exchange-wide total volume during the month was 3.7 million contracts, a
        16-percent increase from the previous month and a four-percent decrease
        from a year ago.
    --  March ADV in futures on the CBOE Volatility Index(®) (VIX(® )Index)
        was 167,591 contracts, an increase of one percent from February 2015 and
        a decrease of nine percent from March 2014. Total volume in VIX futures
        for March was 3.7 million contracts, up 17 percent from the previous
        month and down four percent from a year ago.

CBOE Holdings Average Revenue Per Contract

The following represents average transaction fee per contract based on a three-month rolling average, reported on a one-month lag. The average transaction fee per contract represents total transaction fees for CBOE, C2, and CFE recognized for the period divided by total contracts traded during the period. Average transaction fees per contract can be affected by various factors, including exchange fee rates, volume-based discounts and transaction mix by contract type and product type.



    (In Dollars)       Three-Month Period Ended
    -----------        ------------------------

    Product:           Feb-15                   Jan-15         Dec-14        Nov-14
    --------

    Equity Options                       $0.070         $0.069        $0.068          $0.074
    --------------                       ------         ------        ------          ------

    Index Options                        $0.704         $0.702        $0.696          $0.692
    -------------                                      ------                       ------

    ETP Options                          $0.115         $0.111        $0.105          $0.107
    -----------                          ------         ------        ------          ------

         Total Options
          Average
          Revenue Per
          Contract                       $0.283         $0.279        $0.284          $0.279
         -------------                   ------         ------        ------          ------

    Futures                              $1.649         $1.647        $1.616          $1.628
    -------                              ------         ------        ------          ------

         Total Average
          Revenue Per
          Contract                       $0.340         $0.333        $0.340          $0.331
         =============                   ======         ======        ======          ======

About CBOE Holdings:
CBOE Holdings, Inc. (NASDAQ: CBOE) is the holding company for Chicago Board Options Exchange, Incorporated (CBOE), CBOE Futures Exchange, LLC (CFE) and other subsidiaries. CBOE, the largest U.S. options exchange and creator of listed options, continues to set the bar for options and volatility trading through product innovation, trading technology and investor education. CBOE Holdings offers equity, index and ETP options, including proprietary products, such as S&P 500 options (SPX), the most active U.S. index option, and options and futures on the CBOE Volatility Index (the VIX Index). Other products engineered by CBOE include equity options, security index options, Weeklys options, LEAPS options, FLEX options, and benchmark products such as the CBOE S&P 500 BuyWrite Index (BXM). CBOE Holdings is home to the world-renowned Options Institute and www.cboe.com, the go-to place for options and volatility trading resources.

CBOE-V
CBOE-2
CBOE-EF

CBOE(®), Chicago Board Options Exchange(®), CFE(®), Execute Success(®), FLEX(®), LEAPS(®), CBOE Volatility Index(® )and VIX(®) are registered trademarks, and BuyWrite(SM), BXM(SM), CBOE Futures Exchange(SM), The Options Institute(SM) and Weeklys(SM) are service marks of Chicago Board Options Exchange, Incorporated (CBOE). C2(SM) and C2 Options Exchange(SM) are service marks of C2 Options Exchange, Incorporated (C2). Russell 2000(®) is a registered trademark of Frank Russell Company, used under license. Standard & Poor's(®), S&P(®) and S&P 500(®) are registered trademarks of Standard & Poor's Financial Services, LLC and have been licensed for use by CBOE, C2 and CFE. All other trademarks and service marks are the property of their respective owners.

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SOURCE CBOE Holdings, Inc.