The claim: The damage done to the economy has already been many times the value of the UK's contribution to the EU Budget.
Reality Check verdict: There may already have been an impact on the economy or the public finances but we do not yet have data showing that. The indicative cost of borrowing for the government has actually fallen.
You would expect that to mean the government would have to pay more to borrow money - the Office for Budget Responsibility says that an extra one percentage point on the government's cost of borrowing would cost the exchequer an extra £8bn in 2019-20. But in fact, what has happened is that the yield, or return, on government bonds (which is a good indicator of the interest rate the government would have to pay to borrow money) has fallen, because in uncertain times people look for relatively safe investments, such as government bonds. So given the evidence so far, the interest paid on gilts (UK government bonds) will fall, saving the government money, although it is also likely that inflation will rise, which will increase the amount the government has to pay on loans linked to the inflation rate.