Published
By Padraig Prendergast
Newsbeat reporter
You might have heard the UK's credit rating has been downgraded after the Brexit vote.
The UK used to have the highest rating possible of AAA.
Just like we have credit ratings in our personal lives, countries need them too.
The higher the credit rating, the easier it is to get a loan or credit with a good interest rate. So in simple terms, the UK is now no longer seen as such a safe bet.
Britain has held a AAA rating since 1978. Our rating is now AA which is the same as France but worse than Germany.
Why has the rating been downgraded?
Before the referendum, the stock markets were fairly stable.
But the vote to leave the EU has changed all that. No-one can accurately predict what will now happen to Britain's economy.
And when there's uncertainty, the markets panic.
The pound is down in value, the FTSE stock exchange is down and the prime minister has announced his resignation.
Britain's now a bit like having a slightly dodgy mate. If you lend them money, can you be sure you'll get it back?
Image source, Getty Images
Being part of the EU, the UK can ask for financial help if things go wrong. But now it's on the way out, there's no back up.
Who decides the ratings?
There are three main independent companies that look at global credit ratings.
Their job is to look long term and decide the predictability, stability, and effectiveness of a country's economy.
They then award a rating, which countries can use as a guide when deciding whether to lend.
Image source, BBC / Padraig Prendergast
What will the downgrade mean?
It could make it more expensive for big companies, institutions and parts of government to borrow money in international financial markets.
Other countries want to see some evidence that the UK can stand on its own.
But it's too soon to know whether it will affect things getting personal loans, for things like mortgages.
The Chancellor George Osborne said the economy would need to "adjust" but was strong enough to cope.
The downgrade doesn't have to last forever.
When Ireland signed an international bailout from the EU in 2011, their credit rating was downgraded.
But it went back up in May this year as their economy showed it was recovering.
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