Accounting changes

Restatements made to the financial statements 2008

This Annual Report 2008, including UBS’s Group financial statements and other information, replaces the Annual Report 2008 issued and filed with the US SEC on Form 20-F on 11 March 2009.

UBS has restated its 2008 Group financial statements to correct identified accounting errors related to the 2008 Group financial statements included in the Annual Report 2008 issued on 11 March 2009. These errors are not material to the annual or quarterly 2008 financial statements, but related corrections would have been material to first quarter 2009 financial statements. The restatement comprises three items in excess of CHF 100 million as follows: increase in fair value of auction rate securities purchase commitments at 31 December 2008 (charge to net trading income of Wealth Management US of CHF 112 million), calculation of interest income based on the effective interest rate method for assets reclassified from “held-for-trading” to “loans and receivables” in fourth quarter 2008 (reduction of the interest income of the Investment Bank by CHF 180 million), realization of a foreign currency translation loss deferred in shareholders’ equity due to the partial disposals of an investment in a consolidated investment fund (reduction of other income of Corporate Center by CHF 192 million). In addition, a number of misstatements, individually below CHF 65 million, were adjusted resulting in an increase of net profit attributable to UBS shareholders by CHF 79 million.

The total net impact of all restated items on the 2008 results was a reduction of net profit and net profit attributable to UBS shareholders of CHF 405 million, and a reduction of equity and equity attributable to UBS shareholders of CHF 269 million. The BIS tier 1 capital decreased by CHF 217 million, the BIS total ratio decreased by 0.1% and the BIS tier 1 ratio was not affected by the restatement. 2008 quarterly net profits attributable to UBS shareholders were reduced by the following amounts: CHF 82 million in the first quarter, CHF 37 million in the second quarter, CHF 13 million in the third quarter and CHF 273 million in the fourth quarter.

Share-based payments: revisions to International Financial Reporting Standard 2

UBS adopted amended IFRS 2 on 1 January 2008. As a result, from 1 January 2008, UBS's share-based awards that are not generally forfeited upon the employee leaving UBS are expensed in the performance year. In contrast, share-based awards featuring stringent forfeiture rules are amortized over the shorter of the legal vesting period and the period from grant through to the retirement eligibility date of the employee.

UBS has fully restated the two prior years (2006 and 2007), with net profit attributable to UBS shareholders declining by CHF 863 million in 2007 and declining by CHF 730 million in 2006. The net increase in compensation expense was CHF 797 million for 2007 and CHF 516 million for 2006, mainly affecting the Investment Bank. Refer to "Note 1 Summary of significant accounting policies" in the financial statements of this report for more information.

Recognition of a defined benefit asset for the Swiss pension plan

In third quarter 2008, UBS concluded that it meets the requirements of IAS 19 Employee Benefits for recognizing a defined benefit asset associated with its Swiss pension plan. Prior to this, it had been UBS policy to disclose only this amount in "Note 30 Pension and other post-employment benefit plans" in the financial statements of UBS's annual reports. UBS concluded that recognition of an asset should also consider unrecognized net actuarial losses and past service cost as permitted by IAS 19 as this results in a better reflection of the corridor approach. At the end of third quarter 2008, the measurement of the defined benefit asset represented the total cumulative unrecognized net actuarial losses plus unrecognized past service cost plus the present value of economic benefits available in the form of refunds of the plan or reductions in future contributions to the plan.

The change in accounting policy resulted in the following effects on the balance sheet for 30 September 2008, the date on which the change in policy occurred, 31 December 2007 and 31 December 2006: an increase of approximately CHF 2.1 billion in other assets, an increase of approximately CHF 0.5 billion in deferred tax liabilities and an increase of approximately CHF 1.6 billion in retained earnings. Refer to "Note 1 Summary of significant accounting policies" in the financial statements and the "Capital management" section of this report for more information.

IAS 39 Reclassification of financial instruments

The markets for many financial instruments began to dry up in 2007 and many instruments that previously traded in active and liquid markets ceased to trade actively by mid-2008. In an effort to address accounting concerns arising from the global credit crisis, the International Accounting Standards Board published an amendment to International Accounting Standard 39 (IAS 39 Financial Instruments: Recognition and Measurement) on 13 October 2008.

Although the amendment could have been applied retrospectively from 1 July 2008, UBS decided at the end of October 2008 to apply the amendment prospectively with effect from 1 October 2008 following an assessment of the implications on its financial statements.

Subject to certain conditions being met, the amendments to IAS 39 permit financial assets to be reclassified out of the "held for trading" category if the firm has the intent and ability to hold them for the foreseeable future or until maturity. Eligible assets may be reclassified to the "loans and receivables" category, carried at amortized cost less impairment, or the "available-for-sale" category, carried at fair value through equity, with impairment recognized in profit or loss. Assets designated at fair value through profit or loss ("fair value option") and derivatives may not be reclassified.

Effective 1 October 2008, UBS reclassified eligible assets which it intends to hold for the foreseeable future with a fair value of CHF 17.6 billion on that date from "held for trading" to the "loans and receivables" category. In addition, student loan auction rate securities (ARS) with a fair value of CHF 8.4 billion have been reclassified as of 31 December 2008. In fourth quarter 2008, an impairment charge of CHF 1.3 billion was recognized as credit loss expense on reclassified financial instruments. If reclassification had not occurred, the impairment charge would not have been recognized but a trading loss of CHF 4.8 billion would have been recorded in UBS's fourth quarter income statement. In the fourth quarter, the operating profit before taxes would have been CHF 3.6 billion lower if the reclassification had not occurred. Refer to "Note 29 Measurement categories of financial assets and liabilities" in the financial statements of this report for more information on the reclassification of financial assets in 2008.

Discontinuation of the adjusted expected credit loss concept

In first quarter 2008, UBS ceased using the adjusted expected credit loss concept in its internal management reporting and began to book, in line with IFRS, actual credit losses (recoveries) instead. Prior year results have been restated. This change had no impact on the Group's overall net profit.