Leyla

The reason dealers can do this and you cannot comes down to one thing: they keep a claim on the car, and you would not.

When a dealer or a lender finances a vehicle, the loan is secured against it and that security is registered. If payments stop, there is a legal process for recovering the vehicle, and it works because the interest is recorded somewhere that a buyer, an insurer and the authorities can see.

As a private seller you have two options and both are bad:

Hand over the car and hold the title. The buyer has your car. You have a piece of paper. If they stop paying you are chasing a stranger for a debt, and repossessing is not something you may simply do yourself.

Keep the car until paid in full. The buyer is paying for something they cannot use. Almost nobody agrees to this, and it also raises the awkward question of who insures it and who is liable for it meanwhile.

There is no arrangement between two individuals that avoids one of those.

One practical note for whatever sale you do end up making: be careful about payment methods that can be reversed after the fact.

Some transfer and payment mechanisms can be pulled back days later, which means handing over a car against a payment that later disappears. Cleared funds in your account, verified with your own bank rather than from a notification, is the standard advice, and it is worth the extra day.

The part that makes these episodes extreme rather than merely notable is usually that more shares were shorted than actually exist as freely tradeable stock.

That sounds impossible and it is not: a borrowed share can be sold to someone who lends it again, so the same underlying share can be shorted more than once. When the total short interest exceeds the shares readily available to buy, closing all those positions requires buying more shares than are for sale.

At that point the price is set by whoever is willing to sell, and if very few are willing, it can go anywhere.

The other ingredient in some episodes is options, which add a second forced-buying loop as the parties who sold the options hedge their exposure. That is a longer explanation, and the shape is the same: automatic buying that is not about anybody's opinion of the company.

The observation that changes how most people think about this: professionals with enormous resources mostly fail to beat a simple broad index over long periods.

That is a well-documented and widely reported finding, and the reasoning behind it is not complicated. Every trade has somebody on the other side, and in a liquid market that somebody is frequently better informed than a private individual choosing a single company.

So the honest question for anyone buying individual shares is: what do I know that the market does not? For most people, most of the time, the answer is nothing — and that is not a criticism, it is the normal condition.

Which is why broad, low-cost, diversified funds are the default recommendation in most general guidance for people who are not doing this professionally. Not because individual shares are forbidden, but because the alternative requires an edge that is hard to establish and easy to imagine.

One thing worth knowing: it may not be final.

What usually happens in these cases is a provisional credit — your account is put right immediately while the process continues behind the scenes. The issuer then pursues the merchant, who has a window to respond with evidence.

Most of the time nothing further happens and the provisional credit becomes permanent. Occasionally a merchant produces a signed slip showing a different amount and the credit is reversed, which is an unpleasant surprise if you assumed it was closed.

So keep the receipt photograph and any correspondence for a few months. It costs nothing and it means you are not reconstructing the case later.

Two practical things worth doing now regardless of the decision: microchipping and registering the details, and a collar with a quick-release buckle.

The chip is what gets a cat home if he ever does get out, and the number of animals brought in with a chip registered to an old address is depressing. Check yours is current.

And if you go the harness route, do not take him out until he has been in for those settling weeks. A cat in a new place on a lead can panic and slip a harness, and then you have the outcome you were trying to avoid.