* Daily Futures and Spot Prices for 1989; data89= {"the date","opening spot price","closing spot price", "opening futures price","closing futures price"} {{"1/3/89", 277.64, 275.32, 279.15, 277.55}, {"1/4/89", 275.82, 279.35, 278.15, 282.2}, {"1/5/89", 279.52, 279.91, 282.95, 282.8}, {"1/6/89", 279.99, 280.81, 283.7, 283.5}, {"1/9/89", 280.68, 280.97, 283.75, 283.8}, {"1/10/89", 280.96, 280.2, 284.4, 282.9}, {"1/11/89", 280.3500000000001, 281.76, 282.7, 284.3}, {"1/12/89", 282.01, 283.45, 284.8, 285.7}, {"1/13/89", 283.11, 283.63, 285.45, 286}, {"1/16/89", 283.86, 284.08, 286.75, 286.5}, {"1/17/89", 284.01, 283.8, 286.15, 286.1}, {"1/18/89", 283.55, 286.84, 286.3, 289.25}, {"1/19/89", 286.57, 286.73, 288.55, 288.9}, {"1/20/89", 286.89, 286.41, 288.85, 288.3999999999999}, {"1/23/89", 286.68, 284.66, 289.3, 286.35}, {"1/24/89", 284.66, 288.35, 286.85, 290.45}, {"1/25/89", 288.63, 288.93, 291.1000000000001, 291.05}, {"1/26/89", 289.11, 291.88, 290.6, 294.05}, {"1/27/89", 292.2, 293.6, 294.7, 296.25}, {"1/30/89", 293.81, 294.77, 297.1, 296.8}, {"1/31/89", 294.98, 297.27, 297.3500000000001, 299.1000000000001}, {"02/01/89", 297.38, 297.1, 298.3999999999999, 298.8}, {"02/02/89", 297.16, 296.53, 299.2, 298.25}, {"02/03/89", 296.75, 297, 297.5, 298.7}, {"02/06/89", 296.88, 295.7, 297.9, 297.65}, {"02/07/89", 295.91, 299.4, 297.5, 301.3}, {"02/08/89", 299.78, 298.62, 301.8, 300.55}, {"02/09/89", 298.26, 296.15, 299, 297.95}, {"02/10/89", 295.78, 292.13, 296.85, 293.7}, {"02/13/89", 291.97, 292.24, 293.55, 294.7}, {"02/14/89", 292.62, 291.76, 295.7, 293.7}, {"02/15/89", 291.8, 294.41, 293.35, 295.75}, {"02/16/89", 294.28, 294.94, 296.7, 296.3}, {"02/17/89", 294.77, 296.38, 296.5, 297.9}, {"02/21/89", 296.77, 296.03, 298.3, 297.55}, {"02/22/89", 295.8, 291.13, 296.7, 292.35}, {"02/23/89", 290.74, 291.79, 290.9, 293.05}, {"02/24/89", 291.89, 287.23, 293.15, 287.85}, {"02/27/89", 287.11, 287.62, 287.9, 288.75}, {"02/28/89", 287.82, 288.77, 289.05, 289.45}, {"03/01/89", 288.86, 287.12, 290.85, 287.85}, {"03/02/89", 287.36, 289.94, 288.3, 291.15}, {"03/03/89", 289.92, 291.15, 290.7, 291.9}, {"03/06/89", 291.5, 294.73, 292.8, 295.15}, {"03/07/89", 294.64, 293.91, 295.3, 294.75}, {"03/08/89", 293.81, 294.31, 293.95, 294.8}, {"03/09/89", 294.11, 293.94, 294.55, 294.9}, {"03/10/89", 293.69, 292.79, 293.75, 293.45}, {"03/13/89", 292.98, 295.45, 294.15, 296.1}, {"03/14/89", 295.33, 294.93, 296.9, 295.4}, {"03/15/89", 295.15, 296.67, 295.3, 297.1}, {"03/16/89", 296.67, 299.44, 301.65, 303.9}, {"03/17/89", 299.38, 292.44, 298.85, 295.8}, {"03/20/89", 292.69, 289.66, 294.9, 293.35}, {"03/21/89", 289.93, 291.34, 294.8, 295.2}, {"03/22/89", 291.33, 290.23, 295, 294.4}, {"03/23/89", 290.5, 289.02, 294.9, 292.65}, {"03/27/89", 288.73, 290.16, 291.3, 294.2}, {"03/28/89", 290.63, 291.31, 295.2, 295.4}, {"03/29/89", 291.58, 292.36, 294.85, 296.45}, {"03/30/89", 292.36, 292.41, 296.5, 295.8999999999999}, {"03/31/89", 292.53, 294.9100000000001, 297, 298.15}, {"04/03/89", 294.97, 296.32, 298.05, 299.2}, {"04/04/89", 296.05, 295.3, 299.2, 299.2}, {"04/05/89", 295.33, 296.26, 299.25, 299.7}, {"04/06/89", 296.05, 295.32, 298.65, 298.5}, {"04/07/89", 295.01, 297.13, 297.5, 300.3}, {"04/10/89", 297.25, 297.1, 300.7, 300.25}, {"04/11/89", 297.19, 298.45, 300.6, 301.65}, {"04/12/89", 298.74, 298.97, 302, 302.15}, {"04/13/89", 298.75, 296.41, 301.1, 299.4}, {"04/14/89", 296.82, 301.2799999999999, 301.9, 304.1}, {"04/17/89", 301.09, 301.5, 303.8, 304.25}, {"04/18/89", 302.39, 305.89, 307.6, 308.7}, {"04/19/89", 305.74, 307.1499999999999, 308.15, 309.95}, {"04/20/89", 307.31, 306.2, 310.85, 309.25}, {"04/21/89", 306.64, 309.1600000000001, 309.85, 311.35}, {"04/24/89", 309.03, 308.49, 311.35, 311.2}, {"04/25/89", 308.87, 306.91, 312, 309.15}, {"04/26/89", 306.93, 306.84, 309.35, 309.25}, {"04/27/89", 307.02, 309.43, 309.2, 311.65}, {"04/28/89", 309.52, 309.51, 311.75, 311.75}, {"05/01/89", 309.12, 308.95, 309.5, 311.05}, {"05/02/89", 309.13, 308.28, 311.8, 310.05}, {"05/03/89", 308, 307.93, 309.2, 309.65}, {"05/04/89", 307.85, 307.7, 309.6, 309.85}, {"05/05/89", 308.31, 307.45, 311.35, 308.95}, {"05/08/89", 307.36, 305.94, 308.3, 308.1}, {"05/09/89", 305.9, 305.1, 308.45, 307.05}, {"05/10/89", 305.34, 305.9, 306.9, 307.65}, {"05/11/89", 305.8, 306.98, 308.2, 308.85}, {"05/12/89", 306.99, 313.63, 313.5, 315.7}, {"05/15/89", 313.89, 315.88, 316.35, 318}, {"05/16/89", 315.8, 315.26, 317.8, 317.35}, {"05/17/89", 315.33, 317.26, 317.65, 319.5}, {"05/18/89", 317.48, 317.97, 318.75, 320.1999999999999}, {"05/19/89", 317.97, 320.77, 321.15, 322.75}, {"05/22/89", 321.36, 322.06, 324.5, 323.6}, {"05/23/89", 321.85, 318.24, 322.3999999999999, 319.9}, {"05/24/89", 318.24, 318.85, 319.8, 320.3}, {"05/25/89", 319.1, 319.14, 319.4, 320.6}, {"05/26/89", 319.2, 321.29, 320.65, 322.55}, {"05/30/89", 321.59, 318.93, 323.6499999999999, 319.85}, {"05/31/89", 319.04, 319.88, 320.05, 320.9}, {"06/01/89", 320.51, 322.16, 320.75, 323}, {"06/02/89", 321.98, 325.43, 324.65, 326.65}, {"06/05/89", 325.54, 322.0899999999999, 326.1499999999999, 322.65}, {"06/06/89", 322.08, 324.15, 323.5, 325}, {"06/07/89", 324.25, 326.77, 325.8999999999999, 327.65}, {"06/08/89", 326.96, 326.57, 328.15, 327.5}, {"06/09/89", 326.58, 326.5, 327.5, 327.1}, {"06/12/89", 326.63, 325.88, 325.5, 326.4}, {"06/13/89", 326.2300000000001, 324.14, 325.65, 324.15}, {"06/14/89", 323.93, 323.44, 324.75, 323.8}, {"06/15/89", 323.8, 320.28, 323.3999999999999, 320}, {"06/16/89", 319.86, 321.04, 323, 325.85}, {"06/19/89", 321.34, 321.6299999999999, 326.05, 326.3}, {"06/20/89", 321.83, 321.4, 326.6, 325.8999999999999}, {"06/21/89", 321.2699999999999, 320.56, 325.75, 324.65}, {"06/22/89", 320.41, 322.08, 324.7, 327.05}, {"06/23/89", 322.33, 327.7, 329.1, 332.2}, {"06/26/89", 327.96, 326.39, 332.6, 331.05}, {"06/27/89", 326.61, 328.15, 331.9, 332.6}, {"06/28/89", 328.42, 325.28, 332, 329.6}, {"06/29/89", 325.75, 319.7, 328.45, 323.2}, {"06/30/89", 319.67, 317.5899999999999, 322.8, 321.2}, {"07/03/89", 318.06, 319.25, 322.05, 322.1}, {"07/05/89", 319.2, 320.49, 320.8, 323.8500000000001}, {"07/06/89", 320.66, 321.3299999999999, 324.8, 324.45}, {"07/07/89", 321.57, 324.74, 325.4, 328.3}, {"07/10/89", 324.93, 326.92, 329.2499999999999, 330.25}, {"07/11/89", 327.09, 328.76, 331.9, 331.65}, {"07/12/89", 328.77, 329.62, 331.3, 333.15}, {"07/13/89", 329.83, 329.78, 333.6, 333.25}, {"07/14/89", 329.9599999999999, 331.76, 333.8, 335.15}, {"07/17/89", 331.78, 332.43, 335.15, 335.6}, {"07/18/89", 332.42, 331.43, 334.3, 334.2}, {"07/19/89", 331.37, 335.47, 335.25, 338.7}, {"07/20/89", 335.74, 333.42, 338.7, 335.75}, {"07/21/89", 333.37, 334.7799999999999, 335, 337.8}, {"07/24/89", 335.83, 333.67, 337.8, 336.1}, {"07/25/89", 333.7, 333.5299999999999, 336.65, 335.95}, {"07/26/89", 333.86, 337.81, 336.1499999999999, 340.7}, {"07/27/89", 338.12, 341.64, 341.9, 344.35}, {"07/28/89", 341.94, 342.13, 344.6499999999999, 344.25}, {"07/31/89", 342.13, 345.63, 344, 348.3999999999999}, {"08/01/89", 346.13, 343.75, 349.3, 344.25}, {"08/02/89", 343.18, 344.34, 345, 346.85}, {"08/03/89", 344.2200000000001, 344.75, 346.8, 347.55}, {"08/04/89", 344.68, 343.93, 345.1999999999999, 346.5}, {"08/07/89", 344.1, 349.33, 347.6, 351.6}, {"08/08/89", 349.42, 349.08, 351.9, 351.35}, {"08/09/89", 349.3, 346.96, 351, 348.6499999999999}, {"08/10/89", 346.93, 348.24, 347.8, 350.2}, {"08/11/89", 348.28, 344.74, 352.85, 346.5}, {"08/14/89", 344.71, 342.92, 345.95, 345.1}, {"08/15/89", 344.26, 344.7, 346.2, 346.8}, {"08/16/89", 344.8, 345.64, 348.05, 347.55}, {"08/17/89", 345.68, 344.31, 346.8, 346.2}, {"08/18/89", 344.46, 345.34, 345.7, 347.25}, {"08/21/89", 346.01, 340.59, 347.65, 341.1}, {"08/22/89", 340.64, 341.1499999999999, 340.9, 342.6000000000001}, {"08/23/89", 341.23, 344.73, 343.35, 346.5}, {"08/24/89", 344.75, 351.22, 347.1, 353.4}, {"08/25/89", 351.43, 350.57, 353.3, 352}, {"08/28/89", 349.56, 351.78, 351.1499999999999, 353}, {"08/29/89", 352.1, 349.72, 353.05, 350.65}, {"08/30/89", 349.85, 350.86, 350.55, 352.2}, {"08/31/89", 350.66, 350.73, 352.45, 351.9}, {"09/01/89", 351.37, 353.6499999999999, 352.45, 354.4}, {"09/05/89", 353.72, 352.36, 353.9499999999999, 353.1}, {"09/06/89", 352.4599999999999, 349.45, 352.5, 349.8}, {"09/07/89", 349.28, 348.62, 350.6, 348.8}, {"09/08/89", 348.36, 348.6, 348.55, 348.6499999999999}, {"09/11/89", 348.75, 347.3899999999999, 348.25, 348.15}, {"09/12/89", 347.63, 348.7699999999999, 348.45, 348.8500000000001}, {"09/13/89", 349.64, 345.46, 349.3, 344.7}, {"09/14/89", 345.46, 343.34, 345.1999999999999, 343.6}, {"09/15/89", 343.19, 344.44, 348.7, 348.9}, {"09/18/89", 345.0400000000001, 346.82, 349.4, 352.05}, {"09/19/89", 347.31, 346.55, 352.45, 351.25}, {"09/20/89", 346.56, 346.42, 350.8, 351.65}, {"09/21/89", 347.62, 345.7, 351.95, 349.9}, {"09/22/89", 345.69, 347.07, 350.45, 351.4}, {"09/25/89", 346.99, 344.4, 350.7, 348.6}, {"09/26/89", 344.2200000000001, 344.13, 349.55, 349.3}, {"09/27/89", 342.86, 345.1, 347.8, 349.8}, {"09/28/89", 345.14, 348.37, 350.2, 352.65}, {"09/29/89", 348.63, 348.55, 353.15, 352.65}, {"10/02/89", 349.19, 350.96, 352.8, 354.8}, {"10/03/89", 350.85, 354.69, 355.75, 358.9}, {"10/04/89", 354.75, 356.91, 359.8999999999999, 361.2}, {"10/05/89", 356.92, 356.71, 360.75, 361.25}, {"10/06/89", 357, 358.68, 361.9, 362.4}, {"10/09/89", 358.65, 359.76, 362.25, 363.45}, {"10/10/89", 359.83, 359.14, 363.6499999999999, 363.25}, {"10/11/89", 359.1, 357.02, 362.7, 360.7}, {"10/12/89", 356.93, 355.09, 360.35, 358.95}, {"10/13/89", 355.41, 333.12, 357.9, 328.85}, {"10/16/89", 333.16, 341.92, 324.1, 345.4}, {"10/17/89", 342.84, 341.01, 341, 343.55}, {"10/18/89", 341.08, 342.12, 342.5, 345.1999999999999}, {"10/19/89", 342.32, 347.1, 346.3, 349.1}, {"10/20/89", 347.07, 346.95, 349.2, 350}, {"10/23/89", 346.97, 344.7, 350.3, 347.5}, {"10/24/89", 344.35, 343.66, 346.95, 346}, {"10/25/89", 343.69, 342.19, 345.7, 344.6499999999999}, {"10/26/89", 342.47, 338, 343.7, 340.1000000000001}, {"10/27/89", 337.96, 334.73, 339.8000000000001, 337.2}, {"10/30/89", 335.41, 335.04, 338.5, 337.5}, {"10/31/89", 335.08, 339.66, 338.9, 342.05}, {"11/01/89", 340.37, 340.71, 342.95, 343.05}, {"11/02/89", 340.83, 338.48, 342.8, 340.2}, {"11/03/89", 337.81, 337.61, 338.2, 339.6}, {"11/06/89", 336.53, 332.62, 337.7, 333.95}, {"11/07/89", 332.27, 334.8, 333.6, 336.55}, {"11/08/89", 335.54, 338.15, 337.2, 339.85}, {"11/09/89", 338.13, 336.58, 340.1000000000001, 338.15}, {"11/10/89", 336.6, 339.08, 339.3, 341.2}, {"11/13/89", 339.08, 339.74, 341.9, 342.35}, {"11/14/89", 339.56, 337.79, 342.3, 339.7}, {"11/15/89", 338.01, 340.26, 340.9, 342.2}, {"11/16/89", 340.57, 340.21, 342.85, 341.95}, {"11/17/89", 340.51, 341.46, 341.65, 342.3999999999999}, {"11/20/89", 341.65, 339.28, 342.8, 340.9}, {"11/21/89", 339.36, 339.43, 341.2, 341.1499999999999}, {"11/22/89", 339.62, 341.88, 341.8, 343.25}, {"11/24/89", 341.94, 344.02, 343.9, 345.15}, {"11/27/89", 344.11, 345.63, 345.35, 346.85}, {"11/28/89", 345.59, 345.68, 346.8, 346.7}, {"11/29/89", 345.47, 343.5899999999999, 345.75, 344.75}, {"11/30/89", 344.06, 345.94, 345.8, 347.3}, {"12/01/89", 346.3299999999999, 350.5, 348.15, 351.55}, {"12/04/89", 350.62, 351.38, 352.1, 351.95}, {"12/05/89", 351.42, 349.89, 351.75, 350.15}, {"12/06/89", 349.59, 348.76, 350.35, 349.3}, {"12/07/89", 348.53, 347.9, 349.1, 348.3999999999999}, {"12/08/89", 347.6, 348.3999999999999, 349.3, 349.1}, {"12/11/89", 348.66, 348.41, 349.3, 349.1}, {"12/12/89", 348.54, 351.72, 349.6, 352.5}, {"12/13/89", 351.7, 352.16, 353, 352.85}, {"12/14/89", 352.74, 350.69, 352.35, 350.8999999999999}, {"12/15/89", 350.97, 349.48, 355.75, 353.9}, {"12/18/89", 350.13, 343.43, 354.55, 347.9}, {"12/19/89", 343.68, 342.42, 347.6999999999999, 346.85}, {"12/20/89", 342.5, 342.81, 348.3, 347.75}, {"12/21/89", 342.88, 344.51, 348.6, 348.8500000000001}, {"12/22/89", 344.81, 347.5, 350.1, 351.35}, {"12/26/89", 347.41, 347.16, 351.6, 350.7}, {"12/27/89", 346.84, 348.36, 350.65, 353}, {"12/28/89", 348.8, 350.37, 353.5, 354.55}, {"12/29/89", 350.68, 352.93, 355.2, 356.75}}