The closing price for MDU Resources (MDU) between 1980 and 1999 was $1.53, on December 31, 1999. It was up 865.2% in that time. The latest price is $19.22.

DATE	OPEN	HIGH	LOW	CLOSE	VOLUME
December 1999	$1.66	$1.72	$1.44	$1.53	12,651,653
November 1999	$1.77	$1.85	$1.58	$1.66	5,350,370
October 1999	$1.69	$1.85	$1.69	$1.77	7,355,130
September 1999	$1.75	$1.88	$1.70	$1.71	6,466,363
August 1999	$1.82	$1.86	$1.71	$1.77	4,579,354
July 1999	$1.72	$1.84	$1.70	$1.83	9,110,187
June 1999	$1.70	$1.82	$1.68	$1.72	9,437,407
May 1999	$1.60	$1.73	$1.54	$1.71	10,030,907
April 1999	$1.72	$1.77	$1.52	$1.59	11,269,385
March 1999	$1.73	$1.74	$1.59	$1.71	10,992,460
February 1999	$1.71	$1.76	$1.62	$1.74	7,114,298
January 1999	$1.96	$2.01	$1.68	$1.70	6,902,463
December 1998	$1.85	$2.03	$1.84	$1.95	5,001,252
November 1998	$1.96	$2.01	$1.85	$1.85	7,325,546
October 1998	$1.92	$2.03	$1.83	$1.95	8,232,068
September 1998	$1.86	$2.12	$1.83	$1.93	8,743,911
August 1998	$1.66	$1.90	$1.63	$1.86	9,925,582
July 1998	$1.73	$1.77	$1.61	$1.65	6,584,703
June 1998	$1.60	$1.75	$1.59	$1.73	8,941,544
May 1998	$1.67	$1.70	$1.53	$1.60	8,878,524
April 1998	$1.80	$1.81	$1.62	$1.67	13,964,394
March 1998	$1.48	$1.82	$1.47	$1.79	6,545,060
February 1998	$1.43	$1.57	$1.43	$1.48	4,938,530
January 1998	$1.47	$1.48	$1.35	$1.43	6,193,579
December 1997	$1.41	$1.60	$1.37	$1.51	5,895,348

Daily pricing data for MDU Resources dates back to 2/21/1973, and may be incomplete.