Value of the investment at close of period. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 6
-Subparagraph (SX 210.12-14(3))
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-Topic 946
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-Section S99
-Paragraph 6
-Subparagraph (SX 210.12-14(Column E))
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Amount of unrealized gain (loss) on investment in marketable security.

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-Topic 220
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