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2014
2015
2016
$18.66, Sep 26 12:53 am $18.93, Nov 20 - Nov 28 $19.02, Nov 30 - Dec 8 $19.11, Dec 10 - Jan 1 $19.19, Jan 2 - Jan 25 $19.27, Jan 25 - Feb 8 $19.35, Feb 8 - Mar 2 $19.43, Mar 3 - Apr 10 $19.51, Apr 11 - Apr 21 $19.59, Apr 21 - May 11 $19.59, Apr 21 - May 11 $2.00, May 3 - May 18 $0.96, May 3 - May 16 $19.67, May 11 - Jun 1 $2.00, May 3 - May 18 $0.96, May 3 - May 16 $19.67, May 11 - Jun 1 $2.00, May 3 - May 18 $0.94, May 17 2:41 pm $19.67, May 11 - Jun 1 $2.49, May 19 - May 27 $0.84, May 20 4:34 am $19.67, May 11 - Jun 1 $2.49, May 19 - May 27 $0.73, May 22 2:56 pm $19.67, May 11 - Jun 1 $2.49, May 19 - May 27 $0.57, May 25 6:42 am $19.67, May 11 - Jun 1 $2.49, May 19 - May 27 $0.47, May 27 - May 28 $19.67, May 11 - Jun 1 $3.98, May 29 - Aug 1 $0.43, May 30 9:22 am $19.67, May 11 - Jun 1 $3.98, May 29 - Aug 1 $0.40, Jun 1 9:52 am $19.75, Jun 2 - Jun 22 $3.98, May 29 - Aug 1 $0.35, Jun 4 2:31 am $19.75, Jun 2 - Jun 22 $3.98, May 29 - Aug 1 $0.32, Jun 5 11:30 pm $19.75, Jun 2 - Jun 22 $3.98, May 29 - Aug 1 $0.26, Jun 8 4:52 pm $19.75, Jun 2 - Jun 22 $3.98, May 29 - Aug 1 $0.20, Jun 11 - Jun 12 $19.75, Jun 2 - Jun 22 $3.98, May 29 - Aug 1 $0.16, Jun 13 7:45 pm $19.75, Jun 2 - Jun 22 $3.98, May 29 - Aug 1 $0.12, Jun 16 1:32 am $19.75, Jun 2 - Jun 22 $3.98, May 29 - Aug 1 $0.48, Jun 19 3:05 am $19.75, Jun 2 - Jun 22 $3.98, May 29 - Aug 1 $0.07, Jun 20 - Jun 22 $19.83, Jun 22 - Jul 4 $3.98, May 29 - Aug 1 $0.31, Jun 22 - Jun 25 $19.83, Jun 22 - Jul 4 $3.98, May 29 - Aug 1 $0.42, Jun 25 - Jun 28 $19.83, Jun 22 - Jul 4 $3.98, May 29 - Aug 1 $0.49, Jun 29 - Jun 30 $19.83, Jun 22 - Jul 4 $3.98, May 29 - Aug 1 $0.48, Jul 1 - Jul 7 $19.91, Jul 5 - Jul 14 $3.98, May 29 - Aug 1 $0.48, Jul 1 - Jul 7 $19.91, Jul 5 - Jul 14 $3.98, May 29 - Aug 1 $0.46, Jul 10 9:43 am $19.91, Jul 5 - Jul 14 $3.98, May 29 - Aug 1 $0.43, Jul 12 8:08 pm $19.99, Jul 15 - Jul 25 $3.98, May 29 - Aug 1 $0.36, Jul 15 3:14 pm $19.99, Jul 15 - Jul 25 $3.98, May 29 - Aug 1 $0.29, Jul 18 7:26 am $19.99, Jul 15 - Jul 25 $3.98, May 29 - Aug 1 $0.25, Jul 20 12:50 pm $19.99, Jul 15 - Jul 25 $3.98, May 29 - Aug 1 $0.23, Jul 21 - Jul 23 $19.99, Jul 15 - Jul 25 $3.98, May 29 - Aug 1 $0.49, Jul 24 - Jul 29 $20.07, Jul 26 - Aug 6 $3.98, May 29 - Aug 1 $0.49, Jul 24 - Jul 29 $20.07, Jul 26 - Aug 6 $3.98, May 29 - Aug 1 $0.63, Jul 30 2:07 am $20.07, Jul 26 - Aug 6 $3.98, May 29 - Aug 1 $1.00, Jul 31 - Sep 22 $20.07, Jul 26 - Aug 6 $3.92, Aug 4 2:36 pm $1.00, Jul 31 - Sep 22 $20.07, Jul 26 - Aug 6 $3.98, Aug 6 - Aug 28 $1.00, Jul 31 - Sep 22 $20.14, Aug 7 - Aug 15 $3.98, Aug 6 - Aug 28 $1.00, Jul 31 - Sep 22 $20.21, Aug 16 - Aug 27 $3.98, Aug 6 - Aug 28 $1.00, Jul 31 - Sep 22 $20.28, Aug 28 - Sep 6 $3.98, Aug 6 - Aug 28 $1.00, Jul 31 - Sep 22 $20.28, Aug 28 - Sep 6 $3.99, Aug 29 - Oct 2 $1.00, Jul 31 - Sep 22 $20.35, Sep 7 - Sep 22 $3.99, Aug 29 - Oct 2 $1.00, Jul 31 - Sep 22 $20.52, Sep 24 - Oct 2 $3.99, Aug 29 - Oct 2 $0.98, Sep 24 5:18 am $20.52, Sep 24 - Oct 2 $3.99, Aug 29 - Oct 2 $0.97, Sep 26 5:35 am $20.52, Sep 24 - Oct 2 $3.99, Aug 29 - Oct 2 $0.95, Sep 28 6:02 am $20.52, Sep 24 - Oct 2 $3.99, Aug 29 - Oct 2 $0.92, Oct 2 9:06 am $20.24, Oct 4 - Oct 12 $4.73, Oct 4 - Oct 12 $0.90, Oct 4 11:44 am $20.24, Oct 4 - Oct 12 $4.73, Oct 4 - Oct 12 $0.88, Oct 6 1:23 pm $20.24, Oct 4 - Oct 12 $4.73, Oct 4 - Oct 12 $0.48, Oct 8 3:50 pm $20.24, Oct 4 - Oct 12 $4.73, Oct 4 - Oct 12 $0.36, Oct 10 5:40 pm $20.24, Oct 4 - Oct 12 $4.73, Oct 4 - Oct 12 $0.24, Oct 12 8:17 pm $20.13, Oct 14 - Oct 22 $4.71, Oct 17 - Oct 30 $0.04, Oct 17 3:28 am $20.13, Oct 14 - Oct 22 $4.71, Oct 17 - Oct 30 $0.01, Oct 18 - Nov 25 $20.02, Oct 27 - Oct 30 $4.71, Oct 17 - Oct 30 $0.01, Oct 18 - Nov 25 $19.91, Nov 5 - Nov 11 $4.69, Nov 5 5:25 am $0.01, Oct 18 - Nov 25 $19.91, Nov 5 - Nov 11 $4.40, Nov 11 2:35 pm $0.01, Oct 18 - Nov 25 $19.81, Nov 16 - Nov 23 $4.03, Nov 16 1:00 pm $0.01, Oct 18 - Nov 25 $19.81, Nov 16 - Nov 23 $3.49, Nov 19 1:31 pm $0.01, Oct 18 - Nov 25 $19.81, Nov 16 - Nov 23 $3.32, Nov 21 2:42 pm $0.01, Oct 18 - Nov 25 $19.81, Nov 16 - Nov 23 $3.26, Nov 23 3:52 pm $0.01, Oct 18 - Nov 25 $19.71, Nov 25 - Dec 11 $3.23, Nov 27 3:45 pm $0.04, Nov 27 - Dec 3 $19.71, Nov 25 - Dec 11 $3.16, Nov 29 2:08 pm $0.04, Nov 27 - Dec 3 $19.71, Nov 25 - Dec 11 $3.04, Dec 1 1:32 pm $0.04, Nov 27 - Dec 3 $19.71, Nov 25 - Dec 11 $3.14, Dec 3 11:40 am $0.04, Nov 27 - Dec 3 $19.71, Nov 25 - Dec 11 $2.61, Dec 7 7:45 am $0.47, Dec 5 - Dec 18 $19.71, Nov 25 - Dec 11 $2.76, Dec 9 9:47 am $0.47, Dec 5 - Dec 18 $19.71, Nov 25 - Dec 11 $3.93, Dec 11 10:38 am $0.47, Dec 5 - Dec 18 $19.94, Dec 13 - Jan 1 $3.99, Dec 13 10:29 am $0.47, Dec 5 - Dec 18 $19.94, Dec 13 - Jan 1 $3.65, Dec 16 9:40 am $0.47, Dec 5 - Dec 18 $19.94, Dec 13 - Jan 1 $3.53, Dec 18 8:23 am $0.47, Dec 5 - Dec 18 $19.94, Dec 13 - Jan 1 $3.11, Dec 22 11:30 am $0.35, Dec 22 - Dec 30 $19.94, Dec 13 - Jan 1 $2.93, Dec 24 2:02 pm $0.35, Dec 22 - Dec 30 $19.94, Dec 13 - Jan 1 $3.91, Dec 26 9:43 pm $0.35, Dec 22 - Dec 30 $19.94, Dec 13 - Jan 1 $3.99, Dec 28 11:14 pm $0.35, Dec 22 - Dec 30 $19.94, Dec 13 - Jan 1 $3.88, Jan 1 12:38 am $1.96, Jan 1 12:38 am $20.69, Jan 2 - Mar 7 $3.76, Jan 2 7:42 pm $1.98, Jan 2 - Jan 4 $20.69, Jan 2 - Mar 7 $3.82, Jan 5 6:17 am $1.97, Jan 5 6:17 am $20.69, Jan 2 - Mar 7 $3.99, Jan 8 - Jan 10 $0.78, Jan 8 1:57 pm $20.69, Jan 2 - Mar 7 $3.99, Jan 8 - Jan 10 $0.93, Jan 10 - Jan 12 $20.69, Jan 2 - Mar 7 $3.85, Jan 13 12:36 pm $0.85, Jan 13 12:36 pm $20.69, Jan 2 - Mar 7 $3.74, Jan 15 4:48 am $0.76, Jan 15 4:48 am $20.69, Jan 2 - Mar 7 $3.54, Jan 16 8:35 pm $0.68, Jan 16 8:35 pm $20.69, Jan 2 - Mar 7 $3.17, Jan 20 3:20 am $0.49, Jan 20 3:20 am $20.69, Jan 2 - Mar 7 $2.85, Jan 23 7:23 am $0.93, Jan 23 - Jan 24 $20.69, Jan 2 - Mar 7 $2.72, Jan 24 10:27 pm $0.93, Jan 23 - Jan 24 $20.69, Jan 2 - Mar 7 $2.62, Jan 26 2:30 pm $2.00, Jan 26 2:30 pm $20.69, Jan 2 - Mar 7 $2.17, Jan 30 1:12 am $1.93, Jan 30 1:12 am $20.69, Jan 2 - Mar 7 $1.85, Jan 31 8:11 pm $1.69, Jan 31 8:11 pm $20.69, Jan 2 - Mar 7 $1.46, Feb 4 10:46 am $1.14, Feb 4 10:46 am $20.69, Jan 2 - Mar 7 $1.34, Feb 6 5:01 am $1.25, Feb 6 5:01 am $20.69, Jan 2 - Mar 7 $1.17, Feb 8 12:19 am $1.07, Feb 8 12:19 am $20.69, Jan 2 - Mar 7 $0.66, Feb 11 2:24 pm $0.35, Feb 11 2:24 pm $20.69, Jan 2 - Mar 7 $0.14, Feb 13 9:44 am $0.02, Feb 13 - Feb 15 $20.69, Jan 2 - Mar 7 $0.04, Feb 15 5:51 am $0.02, Feb 13 - Feb 15 $20.69, Jan 2 - Mar 7 $0.48, Feb 19 - Feb 21 $0.47, Feb 19 - Feb 21 $20.69, Jan 2 - Mar 7 $0.33, Feb 22 10:34 pm $0.02, Feb 22 - Feb 24 $20.69, Jan 2 - Mar 7 $0.02, Feb 22 - Feb 24 $0.01, Feb 24 - Feb 26 $20.69, Jan 2 - Mar 7 $0.90, Feb 28 3:55 pm $0.48, Feb 28 3:55 pm $20.69, Jan 2 - Mar 7 $0.69, Mar 3 6:34 am $0.48, Mar 3 6:34 am $20.69, Jan 2 - Mar 7 $0.75, Mar 5 6:51 am $0.74, Mar 5 6:51 am $20.69, Jan 2 - Mar 7 $1.54, Mar 7 6:42 am $0.89, Mar 7 6:42 am $20.19, Mar 9 - Mar 16 $1.95, Mar 9 - Mar 11 $1.34, Mar 9 - Mar 11 $20.19, Mar 9 - Mar 16 $1.98, Mar 13 8:02 pm $0.95, Mar 13 8:02 pm $20.19, Mar 9 - Mar 16 $2.00, Mar 16 10:02 pm $1.95, Mar 16 - Mar 19 $20.13, Mar 19 - Mar 21 $1.95, Mar 16 - Mar 19 $1.94, Mar 19 12:58 am $20.13, Mar 19 - Mar 21 $1.91, Mar 21 - Mar 23 $1.83, Mar 21 4:46 am $20.63, Mar 23 - Apr 10 $1.91, Mar 21 - Mar 23 $0.80, Mar 23 12:09 pm $20.63, Mar 23 - Apr 10 $1.99, Mar 28 3:07 am $1.98, Mar 28 3:07 am $20.63, Mar 23 - Apr 10 $1.94, Mar 30 11:49 am $0.82, Mar 30 11:49 am $20.63, Mar 23 - Apr 10 $1.89, Apr 2 1:14 am $0.65, Apr 2 1:14 am $20.63, Mar 23 - Apr 10 $3.88, Apr 4 3:27 pm $0.46, Apr 4 3:27 pm $20.63, Mar 23 - Apr 10 $4.42, Apr 7 6:16 am $0.21, Apr 7 6:16 am $20.63, Mar 23 - Apr 10 $4.36, Apr 10 1:02 am $0.01, Apr 10 - Apr 23 $20.69, Apr 26 - Jun 30 $4.33, Apr 26 - Jun 4 $0.01, Apr 26 - May 5 $20.69, Apr 26 - Jun 30 $4.33, Apr 26 - Jun 4 $3.97, May 8 1:44 pm $20.69, Apr 26 - Jun 30 $4.33, Apr 26 - Jun 4 $3.98, May 10 - Jun 4 $20.69, Apr 26 - Jun 30 $4.52, Jun 8 6:45 pm $3.96, Jun 8 6:45 pm $20.69, Apr 26 - Jun 30 $4.61, Jun 14 2:58 pm $3.74, Jun 14 2:58 pm $20.69, Apr 26 - Jun 30 $3.99, Jun 16 - Jun 30 $3.65, Jun 16 1:20 pm $20.69, Apr 26 - Jun 30 $3.99, Jun 16 - Jun 30 $3.50, Jun 20 8:26 am $20.69, Apr 26 - Jun 30 $3.99, Jun 16 - Jun 30 $3.36, Jun 24 2:51 am $20.69, Apr 26 - Jun 30 $3.99, Jun 16 - Jun 30 $2.70, Jun 28 2:49 am $20.69, Apr 26 - Jun 30 $3.99, Jun 16 - Jun 30 $0.01, Jun 30 4:28 am $21.07, Jul 4 - Jul 10 $3.98, Jul 4 - Jul 14 $3.04, Jul 4 9:32 am $21.07, Jul 4 - Jul 10 $3.98, Jul 4 - Jul 14 $1.64, Jul 10 12:09 am $20.96, Jul 14 - Jul 17 $3.98, Jul 4 - Jul 14 $3.18, Jul 14 2:03 am $20.96, Jul 14 - Jul 17 $3.75, Jul 17 3:29 pm $2.85, Jul 17 3:29 pm $21.76, Jul 21 7:03 am $3.99, Jul 21 7:03 am $2.38, Jul 21 7:03 am $20.69, Jul 24 - Oct 19 $6.19, Jul 24 8:56 pm $0.04, Jul 24 8:56 pm $20.69, Jul 24 - Oct 19 $4.61, Jul 28 9:38 am $0.01, Jul 28 9:38 am $20.69, Jul 24 - Oct 19 $4.62, Aug 1 12:16 am $0.98, Aug 1 - Aug 14 $20.69, Jul 24 - Oct 19 $4.61, Aug 4 2:07 pm $0.98, Aug 1 - Aug 14 $20.69, Jul 24 - Oct 19 $4.59, Aug 8 - Aug 10 $0.98, Aug 1 - Aug 14 $20.69, Jul 24 - Oct 19 $4.60, Aug 14 1:01 am $0.98, Aug 1 - Aug 14 $20.69, Jul 24 - Oct 19 $4.62, Aug 17 6:28 pm $0.95, Aug 17 6:28 pm $20.69, Jul 24 - Oct 19 $4.63, Aug 21 12:59 pm $0.92, Aug 21 12:59 pm $20.69, Jul 24 - Oct 19 $4.65, Aug 27 5:22 am $0.69, Aug 27 5:22 am $20.69, Jul 24 - Oct 19 $4.55, Aug 30 11:12 pm $0.99, Aug 30 11:12 pm $20.69, Jul 24 - Oct 19 $4.49, Sep 5 6:53 pm $1.46, Sep 5 6:53 pm $20.69, Jul 24 - Oct 19 $4.50, Sep 9 5:05 pm $1.54, Sep 9 5:05 pm $20.69, Jul 24 - Oct 19 $4.56, Sep 15 1:01 pm $3.03, Sep 15 1:01 pm $20.69, Jul 24 - Oct 19 $4.60, Sep 19 9:51 am $2.68, Sep 19 9:51 am $20.69, Jul 24 - Oct 19 $4.54, Sep 23 8:25 am $2.32, Sep 23 8:25 am $20.69, Jul 24 - Oct 19 $4.49, Sep 27 6:24 am $2.94, Sep 27 6:24 am $20.69, Jul 24 - Oct 19 $4.48, Oct 1 6:17 am $2.79, Oct 1 6:17 am $20.69, Jul 24 - Oct 19 $4.47, Oct 5 8:14 am $2.70, Oct 5 8:14 am $20.69, Jul 24 - Oct 19 $4.50, Oct 9 11:50 am $2.44, Oct 9 11:50 am $20.69, Jul 24 - Oct 19 $4.54, Oct 11 2:10 pm $2.31, Oct 11 2:10 pm $20.69, Jul 24 - Oct 19 $4.51, Oct 15 12:38 pm $2.05, Oct 15 12:38 pm $20.69, Jul 24 - Oct 19 $4.50, Oct 19 - Nov 4 $1.76, Oct 19 9:14 am $21.48, Oct 23 - Oct 31 $4.50, Oct 19 - Nov 4 $1.44, Oct 23 6:39 am $21.48, Oct 23 - Oct 31 $4.50, Oct 19 - Nov 4 $1.26, Oct 27 4:05 am $21.48, Oct 23 - Oct 31 $4.50, Oct 19 - Nov 4 $1.14, Oct 29 2:49 am $21.48, Oct 23 - Oct 31 $4.50, Oct 19 - Nov 4 $1.02, Oct 31 3:22 am $22.29, Nov 4 - Nov 12 $4.50, Oct 19 - Nov 4 $0.98, Nov 4 3:36 am $22.29, Nov 4 - Nov 12 $4.48, Nov 8 6:47 am $1.00, Nov 8 - Nov 12 $22.29, Nov 4 - Nov 12 $4.49, Nov 12 - Nov 16 $1.00, Nov 8 - Nov 12 $23.12, Nov 16 - Nov 21 $4.49, Nov 12 - Nov 16 $0.98, Nov 16 3:45 pm $23.12, Nov 16 - Nov 21 $4.50, Nov 21 12:51 am $0.96, Nov 21 - Nov 23 $23.97, Nov 23 - Dec 7 $4.49, Nov 23 - Nov 27 $0.96, Nov 21 - Nov 23 $23.97, Nov 23 - Dec 7 $4.49, Nov 23 - Nov 27 $0.83, Nov 27 8:35 pm $23.97, Nov 23 - Dec 7 $4.50, Dec 2 5:28 pm $0.82, Dec 2 5:28 pm $23.97, Nov 23 - Dec 7 $4.49, Dec 7 2:41 pm $0.80, Dec 7 2:41 pm $24.85, Dec 12 - Dec 17 $4.48, Dec 12 4:28 pm $0.61, Dec 12 4:28 pm $24.85, Dec 12 - Dec 17 $4.49, Dec 17 - Dec 30 $0.34, Dec 17 5:27 pm $25.75, Dec 22 - Dec 28 $4.49, Dec 17 - Dec 30 $0.24, Dec 22 - Dec 30 $26.67, Dec 30 - Jan 4 $4.49, Dec 17 - Dec 30 $0.24, Dec 22 - Dec 30 $26.67, Dec 30 - Jan 4 $4.50, Jan 4 10:05 am $0.72, Jan 4 10:05 am $28.00, Jan 9 - Mar 10 $4.49, Jan 9 - Jan 14 $0.01, Jan 9 - Jan 29 $28.00, Jan 9 - Mar 10 $4.50, Jan 19 6:15 am $0.01, Jan 9 - Jan 29 $28.00, Jan 9 - Mar 10 $4.49, Jan 24 - Feb 13 $0.01, Jan 9 - Jan 29 $28.00, Jan 9 - Mar 10 $4.49, Jan 24 - Feb 13 $0.98, Feb 3 8:41 am $28.00, Jan 9 - Mar 10 $4.49, Jan 24 - Feb 13 $1.99, Feb 8 10:18 am $28.00, Jan 9 - Mar 10 $4.49, Jan 24 - Feb 13 $0.71, Feb 13 4:10 pm $28.00, Jan 9 - Mar 10 $4.47, Feb 19 12:30 am $0.70, Feb 19 12:30 am $28.00, Jan 9 - Mar 10 $4.45, Feb 24 1:26 pm $0.69, Feb 24 1:26 pm $28.00, Jan 9 - Mar 10 $4.43, Mar 4 5:28 pm $0.68, Mar 4 5:28 pm $28.00, Jan 9 - Mar 10 $4.49, Mar 10 10:22 pm $0.70, Mar 10 10:22 pm $20.69, Mar 22 - Apr 15 $4.31, Mar 22 8:27 pm $0.71, Mar 22 8:27 pm $20.69, Mar 22 - Apr 15 $4.09, Apr 3 9:01 am $0.70, Apr 3 9:01 am $20.69, Mar 22 - Apr 15 $3.85, Apr 15 12:19 am $0.69, Apr 15 12:19 am
40,024 1,209,052
1,562,500
1,041,667
520,833
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2015
2016
Price Details
New
Latest
$20.69 Apr 15, '16
Highest
$28.00 Jan 9, '16
Lowest
$18.66 Sep 26, '13
Average
$20.69 (30d avg) $26.12 (90d avg) $25.06 (180d avg) $22.87 (365d avg) $20.98 (Lifetime average)
Added
Sep 26, 2013
3rd Party New
Latest
$3.85 Apr 15, '16
Highest
$6.19 Jul 24, '15
Lowest
$0.01 Feb 24, '15
Average
$4.20 (30d avg) $4.40 (90d avg) $4.45 (180d avg) $4.42 (365d avg) $3.88 (Lifetime average)
Added
Sep 26, 2013
3rd Party Used
Latest
$0.69 Apr 15, '16
Highest
$3.98 May 10, '15
Lowest
$0.01 Jan 9, '16
Average
$0.70 (30d avg) $0.65 (90d avg) $0.71 (180d avg) $1.43 (365d avg) $1.05 (Lifetime average)
Added
Sep 26, 2013
Sales Rank
30 day average: 709,432 90 day average: 665,711
Product Description
Options have been traded for hundreds of years, but investment decisions were based on gut feelings until the Nobel Prizewinning discovery of the Black-Scholes options pricing model in 1973 ushered in the era of the quants. Wall Street would never be the same. In , financial economist George G. Szpiro tells the fascinating stories of the pioneers of mathematical finance who conducted the search for the elusive options pricing formula. From the brokers assistant who published the first mathematical explanation of financial markets to Albert Einstein and other scientists who looked for a way to explain the movement of atoms and molecules, retraces the historical and intellectual developments that ultimately led to the widespread use of mathematical models to drive investment strategies on Wall Street.
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