The financial authorities take an interest in a practice known as share pledging.
While it is not illegal, those who indulge in it must report the fact.
As they must also do when indulged in by those who, under Stock Exchange rules, are described as their ‘connected person.’ These include anyone who is more than just a good friend but less than legally bound to them in marriage.
Well ‘partner’ would be especially ambiguous in that world, wouldn’t it.