The credit rating was completely discredited in 2008, when it helped to create the economic catastrphe of that year. Fitch and others gave knowingly bankrupt banks highest rating possible. In industry the rating is viewed with almost contempt. Its meaningless, our lending houses said as much tho morning. Its had no effect on borrowing / lending rates.
The downturn in global markets has far more to do wit the pathetic campaign of lies and exaggerations than brexit. In effect absolutely nothing has changed. Economics is very much a confidence trick. If you shout recession, it happens. Folk in know speculate and make matters worse. Head of German banking has privately made over 200million pounds,buying gold. Ie betting on downturn. It wasn't even a gamble,had market not gone down, gold would have remained static. He,d have broken even but the effect of his selling to buy gold reduces share price and others follow suit.A cynical person might suggest he did it to produce downturn, increase price of gold and hence cause problems for uk.
All nothing at all to do with Brexit , all more to do with greedy investors and folk screaming recession, but Brexit takes the blame.Stayers campaign latch on to it and unsavvy public buy into it.
Not a sinngle contract has been lost,business gone bankrupt, higher interest rate been paid,tarrif been introduced or anything of kind to really affect markets. Just foolish people with vested interests to stay shouting about downturn. That is root cause of problem at moment, and the blame can be put squarely at our governments door for not being honest or realistic during campaign.