The news that John
McDonnell was looking at a scenario where the election of a Labour
government was met with a run on Sterling was all over the news
yesterday. The Conservatives, who of course know all about runs on
Sterling having created one just a year ago with the Brexit vote,
immediately grasped the political gift they had been given.
Paranoia on the left
meets prejudice on the right. But what would really happen to
Sterling if Labour were to win the next election? Given announced
policies, the answer is quite clear: Sterling would appreciate. The main reason is that under Labour there would be a
large fiscal expansion: for certain in term of public investment and
to a lesser extent with current spending. (I assume by then interest
rates will be above their ZLB: if they are not, the fiscal expansion could be even larger.) There would also be a balanced budget fiscal
expansion: even if government spending increases are financed by tax
increases, this is likely to be expansionary to some extent because
some of the tax will come out of savings.
This fiscal
expansion, together perhaps with other labour market measures, would
put upward pressure on inflation, prompting higher interest rates
from the Monetary Policy Committee of the Bank of England. It is the
prospect of those higher interest rates that would make Sterling
appreciate. How much inflation rather than output would rise depends on how pessimistic you are about the supply side. If the MPC were doing their job properly, that increase
in interest rates plus the appreciation would stop inflation rising
very much. We will finally get the rebalancing between monetary and
fiscal policy that we should have had for the last decade.
If we are also in a
transition period for Brexit, with the final destination unclear,
then Labour being elected would also lead to an appreciation because
Labour are softer on Brexit than the Conservatives.
So where does the
run on Sterling idea come from? The idea that all those traders in
currency will get together and engineer one because they do not like
a Labour government is nonsense. They may not like a Labour
government, but they dislike losing money even more. Capital flight? You
might see the share price of power or rail companies fall, but that
is not going to be enough to move a currency like sterling. Any
depreciation in sterling would be the equivalent of pound notes
waiting to be picked up in the City and Wall Street: with higher
expected interest rates and a likely future appreciation, who
wouldn’t buy sterling?
The only way I can
see that you could get a run on Sterling is if enough traders in the
markets came to believe that Labour was going to abolish BoE
independence because it wanted to keep interest rates low. In that
case you could get significantly higher inflation under Labour, which
would justify a nominal Sterling depreciation.
Which, of course, is
why McDonnell committed to keeping Bank of England independence as
one of the first things he did. And which is also why he was very
foolish to say what he said, because it might lead some to speculate that he might renege on that commitment. Something tells me he
is missing his Economic Advisory Council.