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15. Derivative financial instruments continuedNominal amountNominal amounts represent the following:• currency forwards: the sum of all contract volumes, bought or sold, outstanding at the year end;• currency options: the sum of the amounts underlying the options outstanding at the year end;• accrual style option forwards: the nominal value accrued at the year end. Depending on future movements in foreign currency exchangerates the nominal amount at the date of expiry of these options could range between € 125 million and € 435 million; and• derivative share options: the sum of all share options on listed equities, other than Compagnie Financière Richemont SA, granted toexecutives as part of the Group option plan.Foreign currency amounts have been translated to euros using the exchange rates prevailing at the balance sheet date.Non-hedge derivativesNon-hedge derivatives are transactions involving foreign currency options, currency forwards or derivative share options.Interest rate swap derivativesInterest rate swaps have been entered into to manage the risk relative to fluctuations in variable interest rates on short and medium-termlines of credit. At 31 March 2009 the weighted average interest charge of the Group was 2.9 per cent (2008: 3.6 per cent).16. Cash and cash equivalents2009 2008€ m € mCash at bank and on hand 2 032 2 094Bank overdrafts (669) (323)1 363 1 771The effective interest rate on bank overdrafts was 1.9 per cent (2008: 4.1 per cent). The effective interest rate on cash at bank was 3.2 per cent(2008: 4.3 per cent).There is no restricted cash included within cash and cash equivalents. In 2008, € 14 million of restricted cash had been deposited in an accountto satisfy the conditions of a guarantee arrangement.17. Equity17.1. Share capital2009 2008€ m € mAuthorised, issued and fully paid:522 000 000 ‘A’ bearer shares with a par value of CHF 1.00 each 304 304522 000 000 ‘B’ registered shares with a par value of CHF 0.10 each 30 3017.2. Participation reserve334 3342009 2008€ m € mReserve in respect of 574 200 000 participation certificates with no par value issued by Richemont SA – 645On 20 October 2008, the de-twinning of the shares issued by the Company and the participation certificates issued by Richemont SA was effected.The participation certificates from Richemont SA have been converted to ordinary shares and are traded in the name of Reinet Investments S.C.A.on the Luxembourg stock exchange (ISIN: LU0383812293).Richemont Annual Report and Accounts 2009 83Consolidated financial statements