What the differences between the trading securities and available for sales securities ?

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They are classified as unrealized holding gains or losses on the income statement, and the counter account on the balance sheet is allowance for adjusted short-term investments to market

the difference among them is the management intention whether hold the securities for a while ( available for sale ) or selling them over short term ( trading securities ) and another difference when they re-evaluate at the end of the period the result for available for sale appear in other comprehensive income while trading securities appeaer in the income statement .