On the ex-rights day of a stock, XR is written in front of the stock name, which is the abbreviation of Ex-Right, indicating that the stock has been ex-rights, and the purchase of such a stock will no longer be entitled to dividends; DR is written in front of the stock code, which is the abbreviation of Ex-Rivident and Ex-Right, indicating that the stock is ex-rights and ex-dividend, and the purchase of such a stock will no longer be entitled to dividend payments. The stock code is preceded by the symbol DR, which stands for Ex-Rivident and Ex-Right. The symbol XD, which stands for Ex-Divident, indicates that the stock is ex-dividend, and the purchase of such stock will no longer entitle you to dividend payments.
Article quoted from: