Date,Open,High,Low,Close,Volume,OpenInterest
20120727,183.0,183.4,178.4,179.2,118,554
20120728,179.2,180.2,174.5,179.5,1365,1008
20120730,181.0,188.3,180.9,187.8,1640,0
20120731,188.7,191.9,186.5,187.9,1258,1092
20120801,189.0,190.3,183.7,184.4,1291,1204
20120802,185.4,186.2,176.6,177.6,1410,0
20120803,175.0,175.5,170.6,171.3,58,1180
20120804,170.8,171.4,170.8,171.2,1402,0
20120806,168.0,171.1,166.5,170.7,1167,1737
20120807,171.8,175.9,170.4,174.9,1233,0
20120808,175.2,178.2,174.8,175.7,1954,1886
20120809,175.4,184.2,174.5,181.4,1790,0
20120810,180.0,180.0,169.2,169.9,272,2124
20120811,169.1,170.7,168.5,168.8,825,2198
20120813,168.3,171.0,167.2,169.8,825,2489
20120814,169.3,173.9,168.4,173.4,1881,2135
20120816,171.0,172.0,165.5,167.7,685,2236
20120817,167.0,167.6,165.0,167.0,405,2304
20120818,167.1,167.4,166.8,167.2,1521,2446
20120821,168.0,171.2,164.0,169.1,1207,2565
20120822,169.1,170.8,167.9,169.2,2152,0
20120823,170.6,170.8,162.9,166.6,2620,3003
20120824,167.7,171.1,165.2,165.8,336,0
20120825,165.1,165.1,164.0,164.6,0,0