@Reit-Stevie As an investor, you should at best know this in order to decide whether you want to remain invested. However, it is not clear to me that the share price and the gas price are causally linked
@janoleli is due to the ex-date. Many people are invested and as soon as the dividend is paid out, they all get out. that's why the share fell so much in May.
@Reit-Stevie is clear. This is the normal course of a share. The share price falls because of the dividend, many people think wow a bargain and buy and so the price goes up again and many who then panic sell again and the share price goes down again. But the slump is not that extreme now.