ACO (ACO) has the following price history information. Looking back at ACO historical stock prices for the last five trading days, on May 05, 2014, ACO opened at $45.75, traded as high as $45.79 and as low as $45.73, and closed at $45.73. Trading volume was a total of 237.90K shares. On May 06, 2014, ACO opened at $45.74, traded as high as $45.75 and as low as $45.73, and closed at $45.73. Trading volume was a total of 175.90K shares. On May 07, 2014, ACO opened at $45.74, traded as high as $45.78 and as low as $45.73, and closed at $45.74. Trading volume was a total of 196.10K shares. On May 08, 2014, ACO opened at $45.75, traded as high as $45.77 and as low as $45.73, and closed at $45.73. Trading volume was a total of 195.90K shares. On May 09, 2014, ACO opened at $45.75, traded as high as $45.75 and as low as $45.74, and closed at $45.74. Trading volume was a total of 1.65M shares.

ACO Historical Stock Prices By Date:

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31

1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 201420152016201720182019202020212022202320242025

Below, we examine the compound annual growth rate — CAGR for short — of an investment into ACO shares, starting with a $10,000 purchase of ACO, and working forward through the historical stock price information to today. ACO -- use the split history when considering split-adjusted past price performance.

ACO Historical Price Range
Date	Open	High	Low	Close	Volume
05/05/2014	$45.75	$45.79	$45.73	$45.73	237.90K
05/06/2014	$45.74	$45.75	$45.73	$45.73	175.90K
05/07/2014	$45.74	$45.78	$45.73	$45.74	196.10K
05/08/2014	$45.75	$45.77	$45.73	$45.73	195.90K
05/09/2014	$45.75	$45.75	$45.74	$45.74	1.65M

About ACO

AMCOL International is focused on the development and application of minerals and technology products and services. Co. operates the following segments: performance materials, which mines, processes and distributes minerals and products for use in various markets, including metalcasting, pet care, laundry care, and drilling industries; construction technologies, which provides services relating to and processes and distributes clay-based and other products; energy services, which provides services and equipment rentals for onshore and offshore applications in the oil and natural gas industry; and transportation, which includes a long-haul trucking business and a freight brokerage business.

ACO Historical Closing Prices
Date	Close
05/05/2014	$45.73
05/06/2014	$45.73
05/07/2014	$45.74
05/08/2014	$45.73
05/09/2014	$45.74

Materials Historical Prices

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