Power Integrations, Inc. - Investment Calculator

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Calculate Current Value and Shares Since: December 12, 1997

Investment Date:	Original Shares:	Original Value:	Current Shares:	Current Value:	Percent Return:
Dec 12, 1997	118	$ 1,000.00	235	$ 7,423.53	642.35%

Investment of $ 1,000.00 on Dec 12, 1997 would yield $ 7,423.53 today

Adjustments

Date	Reason	Shares	Price	Value	%
Dec 12, 1997	Initial Investment	118	8.50	$1,000.00	0.00%
Nov 23, 1999	Stock Split	235	43.50	$10,235.29	923.53%
Nov 23, 1999	Stock Split	235	43.50	$10,235.29	923.53%
Jul 3, 2008	Current Investment	235	31.55	$7,423.53	642.35%

The Investment Calculator page and related information is provided by Mergent, a third party service. Power Integrations, Inc. does not maintain this page and is not responsible for the accuracy, completeness or timeliness of the information. The results are for illustrative purposes only and should not be relied on for investment purposes. The timing and price of dividend reinvestments, taxes, commissions and other factors may affect the values shown. Please note that historical investment performance is not intended to indicate future performance.

NASDAQ : POWI
Price	$31.55
Change:	- 0.06 (0.19%)
Volume	283,800
Day Range	$29.93 - $32.10
52 Week Range	$21.40 - $35.03
Jul 3, 2008 - 2:34 PM ET

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