12 June 2011
Record date is the date on which Company checks its registered stakeholders who are entitled for the corporate benefits like right, dividend, bonus etc.
Shares purchased after Ex-div. date are quoted at Ex-div Rate in which right to receive the dividend is not available to the buyer.
13 June 2011
To add to above, Record date is the date to ascertain who the member/share holder/debenture holder etc. on a particular date to whom notice of meetings or communications or declared dividend or benefit or interest etc shall be payable. A record date+1 becomes ex-bonus, ex-dividend date