Summary
- The Yen has undergone a massive devaluation against the dollar in recent years
- US and Japan interest differentials suggests the Yen slide may reverse course
- A Yen rally could cause stocks to falter and gold to shine in 2015
Since late 2012, the Yen has fallen nearly 40% as the Bank of Japan
(BOJ) has launched an all-out war to devalue its currency. The forces
that would likely drive this push were no mystery. As outlined on
Financial Sense in June 2012 (see
Massive Japanese Debt Monetization Is Coming, Yen to be Devalued),
Japan's ticking time bomb of debt was coming head to head with its
demographic time bomb, which forced the BOJ to act. This can be seen in
the handoff below as aging Japanese citizens began to sell their debt
holdings while the BOJ ramped up.

Source: Bloomberg
The launch of quantitative easing (QE) in Japan late in 2012 opened
the door for the yen-carry trade to be revived again as the following
article from early 2013 highlights:
Remember the Yen Carry Trade? Well, It’s Back
As confidence returns to global markets, investors appear to be using
the cheap yen once again to fund investments in risky assets — a trade
that is likely to give the battered Japanese currency another boot lower
in the months ahead, analysts said…
This backdrop coincides with a sentiment shift in financial markets, with investors increasingly moving into more risky assets.
"The yen is regaining its ground as a funding currency," said Jesper
Bargmann, head of G11 currencies at Royal Bank of Scotland in Singapore.
"Sentiment has changed in markets, pretty much since January 1. Risk
appetite has returned, there's increased confidence and a search for
yield, so the yen seems to be suffering as a result of that," he said…
A carry trade is when investors borrow in a low yielding currency,
such as the yen, to fund investments in higher yielding assets somewhere
else…
A weakening currency is central to the carry trade since it means
that investors have less to repay when they cash out of the trade.
I don’t believe it is just coincidence that the USD surged relative
to the Yen late in 2012 to early 2014 at the same time the U.S. stock
market soared as shown below.

Source: Bloomberg
Given the rather dramatic decline in the Yen relative to the USD over
the last two years, it makes sense to reevaluate how much more downside
the Yen has and what the implications would be should the Yen rally in
2015. One way to analyze currency movements is based on interest rate
parity (
click for definition)
in which currency exchange rates should move in line with the
differential between country interest rates. As shown below, this theory
more or less works in which the USD/JPY exchange rate tracks the
difference between US 10-yr interest rates and Japanese 10-yr interest
rates. However, there are times when the two diverge and these large
divergences eventually get unwound rather sharply (see yellow shaded
boxes below). We’ve seen three cases in recent years with one in 2010,
2011, and one in 2013. In all of these the JPY/USD exchange rate got the
direction right and the interest rate differential played catch up. We
are currently experiencing our fourth major divergence in recent years
in which the USD has rapidly appreciated relative to the Yen and yet US
long term interest rates have not risen relative to Japan; in fact, the
interest rate differential has declined (see red shaded box).

Source: Bloomberg
This divergence can be unwound by the Yen rallying relative to the
USD and the USD/JPY exchange rate falls, or US long-term interest rates
can rise relative to Japanese to close the gap. Which event occurs in
the months ahead (yen rally or US interest rates rally) will have very
different outcomes for the market. If the Yen rallies and the USD/JPY
exchange rate falls the Yen-carry trade will start to unwind and with it
one element of market liquidity. As shown above, when the USD rallies
relative to the Yen we tend to see strong U.S. stock market returns and
so if the USD falls relative to the Yen we could see some market
weakness ahead. In fact, if the Yen should decline we would be
witnessing a backdrop that we haven’t seen since 2012: no QE from the
U.S. Fed and a strong Yen—two major liquidity supports for U.S.
financial markets for the last two years.
We’ve seen how QE has tended to float the U.S. stock market higher
and when QE was turned off the stock market would stumble. However, the
Fed embarked an open-ended QE late in 2012 such that QE was running for
all of 2013 and the bulk of 2014 and coincident with this time frame was
a massive devaluation of the Yen. The S&P 500 soared during these
times in which both added liquidity to the system, which is shown by the
green shaded regions below while the yellow regions show only an
expansion in the Fed’s balance sheet. We’ve had a lot of stimulus over
the past two years coming from Fed's QE and the Yen-carry trade. We know
the Fed's QE is over and should we also lose the Yen-carry trade we
could be in store for a bumpier ride than we’ve seen recently.

Source: Bloomberg
As mentioned above, the divergence between the USD/JPY exchange rate
and the interest rate spread between the US and Japan can be resolved in
two ways and my inclination is that we see the USD weaken relative to
the Yen in the weeks and months ahead. Why? One reason, as shown above,
is that the USD/JPY exchange rate is bumping up to resistance at the
~$120 level, which is the 2005-2007 resistance zone. So, from a
technical standpoint it’s hard to see the USD appreciate further without
some digestion and consolidation.
Secondly, from a purchasing power parity perspective (
click for definition)
the Yen is at its cheapest valuations relative to the USD since the
middle 1980s. Using Bloomberg’s purchasing power parity function with
the Consumer Price Index (CPI), Producer Price Index (PPI), and the
annual OECD estimates, the Yen is between 15% to 34% undervalued
relative to the USD. Given the multi-decade lows in Yen valuations, a
further depreciation of the Yen appears unlikely.

Source: Bloomberg

Source: Bloomberg

Source: Bloomberg
Assuming for the sake of argument that the Yen does cool off in early
2015, what can we come to expect? As mentioned above, the Yen-carry
trade has been associated with positive stock market returns and so an
unwinding of the Yen-carry trade in which the Yen appreciates relative
to the USD could see a weaker stock market, particularly coupled with
the removal of US QE. Secondly, we could also see a pick up in overall
investor anxiety in which safe haven assets like gold benefit. Both the
Yen and gold peaked in 2011 and accelerated their down falls late in
2012. Should we see stabilization in the Yen ahead we could see stronger
gold prices in 2015.

Source: Bloomberg
Also associated with Yen strength is a pickup in volatility as the
Yen-carry liquidity tide goes out. This is shown below with the USD/JPY
exchange rate shown inverted along with the Volatility index (VIX) with
periods of Yen appreciation shown by the yellow shaded regions.

Source: Bloomberg
Summary
In my last article (
click for link)
I made the case that the U.S. was not at risk of slipping into a
recession and the hallmarks of a bull market top were missing and thus
argued the weakness experienced in December was a buying opportunity.
The market has since rebounded sharply in recent days and looks like it
will experience the seasonal Santa Claus rally into year-end and we
could see some strength spill over into 2015.
While I still do not see the signs of a recession or a bear market on
the horizon that is not to say we can’t see a pickup in volatility or
market gyrations in the year ahead. In fact, I think the most bullish
theme one can be on in 2015 is a pickup in volatility with the removal
of QE and a possible Yen-carry trade unwinding.
As highlighted in this article, there is a large divergence between
the USD/Yen exchange rate and their associated interest rate
differentials and my belief is this divergence will be resolved by the
USD weakening relative to the Yen in the weeks and months ahead. Should
this occur we could see a rough start to 2015 with stocks weakening
while gold rallies. The biggest theme I see for 2015 is a pickup in
volatility and the best advice for that kind of climate is to stay
humble as the market whips around here and there and confuses bulls and
bears alike, and to stay nimble as market volatility always creates
opportunities.