You cannot complain if you picked up a few BP shares before the price of oil started on the course which makes it a threat to the well-being of everyone except those fortunate enough to have direct or indirect shareholdings in an oil company.
You have never quite doubled your money in BP since early 2003, when you could buy it at 369p, but you have come close and it could still happen.
Still, the spectacle of your investment shedding 18p on Tuesday then another 21p yesterday, may be unsettling.
A few more days like these and your shares could look like interesting value again.
Not just your shares, either. Oil shares have provided most of the impetus that carried the Footsie to a four-year high on Monday.
So everybody with a index-tracking ISA has been amply compensated for their pain at the petrol pump ? and compensated, too, for the mindless discipline that required tracker funds to buy PartyGaming when it came to the market in June with a warning that this Internet poker outfit?s activities ?might be considered illegal? in the US. The shares are down 25 per cent now from their starting price of 116p.
So what horror has struck BP that nobody knew about on Monday? Well, BP warned that hurricanes Katrina and Rita would knock some $700 million off its profits, roughly double the damage pencilled in by analysts who are colossally paid to guess these things right.
But everyone knew BP was heavily involved in the Gulf of Mexico and that the hurricanes had made a hash of the oil industry there. So news that they are costing BP $700 million instead of, perhaps, $350 million should not be a mind-stopping shock. And, as Rupert Neale at the Stratford-on-Avon broker Montague Capital notes, it is not a ruinous sum in the context of BP?s overall results.
Anyway, it is the chaos caused by the hurricanes and the fear of physical shortages of heating oil and gasoline in North America this winter that is enriching BP and the rest. You cannot have it both ways.
What matters more is whether the price of crude is set to stay at or over $60 for any length of time. The consequences go far beyond share prices or the mysteries of macro-economics.
Look at T Blair fawning over President Putin, master of our best bankable source of natural gas as the North Sea dries up.
Look at Western banks cascading loans into Russian gas companies ? a reported $12 billion for Gazprom and $7.5 billion for Rosneftegaz (state-owned by Mr Putin?s Government).
The prospect of anything approaching $60 a barrel is enough to generate vast investment in oil and anything that might replace it.
The Saudis are said to be planning a huge drilling programme to boost their potential output and regain control of the market in crude ? while Proctor & Gamble talks of establishing plantations to produce palm and coconut oil to replace some of the oilbased detergents in its shampoos.
There will be plenty more of that kind of thing. What we don?t know is how much of it will work. Or when.