A more thorough explanation:

Definition: The ex-rights date is the date on which a share of common stock no longer offers privilege subscription rights.

For example, if a company announces that it will issue new shares of stock to its existing shareholders, those shareholders will have the right to buy those new shares at a discounted price. However, this right only lasts until the ex-rights date. After that date, any shares of stock bought or sold will not come with the privilege subscription rights.

Another example is if a company decides to issue bonds to raise capital. The ex-rights date for the bonds would be the date on which investors can no longer buy the bonds with the attached rights to convert them into shares of stock.

The ex-rights date is important for investors to keep track of because it affects the value of their investments. If an investor buys shares of stock before the ex-rights date, they will have the opportunity to buy new shares at a discounted price. However, if they buy shares after the ex-rights date, they will not have this opportunity.