Japanese yen and FX sensitivity to interest rates

Interest rates have some way to go before they take over from risk aversion as the key driver of currency markets but as noted in my previous post, low US interest rates have played negatively for the dollar. As markets have continued to pare back US tightening expectations and US interest rate futures have rallied, interest rate differentials have moved against the dollar. 

The most sensitive currency pair in this respect has been USD/JPY which has been the most highly correlated G10 currency pair with relative interest rate differentials over the past month. It has had a high 0.93 correlation with US/Japan interest rate differentials and a narrowing in the rate differential (mainly due to a rally in US rate futures) has resulted in USD/JPY moving lower and the yen becoming one of the best performing currencies over recent weeks.

Going forward the strong FX / interest rate correlation will leave USD/JPY largely at the whim of US interest rate markets (as Japanese rate futures have hardly moved). Fed officials if anything, are adding to the pressure on the dollar as they continue to highlight that US interest rates will not go up quickly. San Francisco Fed President Yellen was the latest official to do so, warning that the prospects for a “tepid” recovery could fuel inflation risks on the downside.

This echoes the sentiments of other Fed officials over recent weeks and suggests that the Fed wants to prevent the market pricing in a premature reversal in US monetary policy.   It looks increasingly likely that the Fed will maintain interest rates at current levels throughout 2010 given the massive amount of excess capacity and benign inflation outlook, suggesting that interest rate differentials will play negatively for the dollar for several months to come.

As for the yen its path will not only depend on relative interest rates but also on the policies of the new DPJ led government. If Japanese press speculation proves correct the new Finance Minister may favour a stronger yen which will benefit domestic consumers rather than a weaker yen that would benefit exporters. Against this background, markets will largely ignore comments by outgoing Finance Minister Yosano who said that further yen strength would be detrimental for exporters.

The market certainly believes that the yen will strengthen further as reflected by the sharp increase in speculative positioning over recent weeks; net CFTC IMM long yen positions have reached their highest since 10 February 2009. Although USD/JPY has pushed higher since it’s low around 90.21 the upside is likely to be limited against this background and a re-test and likely break back below the key 90.00 psychological level is likely soon.

Speculative dollar sentiment worsens

Data releases continue to fail to inspire markets despite the continuing run of better than expected numbers. In the US the Chicago PMI reached the critical boom/bust level of 50.0 in August whilst the less closely followed Milwaukee PMI surged into expansion territory at 56.0.  This revealed some upside risk to the ISM manufacturing index which duly beat consensus coming at 52.9 in August.  The fact that positive data is failing to lift markets is a sign of fatigue and stock markets appear to be running out of fuel.

From an FX perspective these developments will not be sufficient to provoke a break out of well worn ranges. Risk trades remain in favour but the momentum is limited. The prognosis does not look as positive for the dollar as the generally improving environment for risk will play negatively. Speculative sentiment (CFTC Commitment of Traders IMM data) has indeed worsened for the dollar; IMM data revealed net dollar short positions increasing sharply in the latest week, with market positioning worse than the 3-month average.

Much will depend on the US jobs report on Friday but until then the dollar is likely to cling to the weaker end of ranges. I believe that the dollar index will avoid dropping below its August 5th low of 77.428. The main exception to dollar weakness appears to be sterling where sentiment has become more bearish recently. This was reflected in the IMM report in which aside from the dollar, the pound has also been a loser and the only other currency for which speculative appetite worsened.

Are currency market dynamics shifting?

There has been a major shift in market pricing for US interest rates following the US jobs report and comments from Fed officials including Atlanta Fed president Lockhart, suggesting that the Fed should not wait too long before tightening monetary policy.  As a result the implied yield on the December 09 3-month eurodollar futures contract has spiked by around 50bps since the middle of last week and markets have now moved to pricing in a US rate hike by year.  This looks wildly premature given the likely absence of inflation pressures for many months to come. 

The most interesting reaction to the shift in interest rate expectations was exhibited by the dollar which has managed to register solid gains over the last couple of days indicative of the past relationship between the dollar and interest rate expectations.  The odd thing about the strengthening in the dollar is that it has come at a time when risk appetite has continued to improve, suggesting that the strong risk appetite/dollar relationship that has been in place for much of the past year could be diminishing in strength.  For instance, the correlation between various dollar crosses and the VIX volatility index has been higher over the last few months than it has been in previous years.   

Admittedly its early days and the bounce in the dollar may just have reflected a market that was positioned very short dollars.  There was already signs of some short covering prior to the release of the US May jobs report as reflected in the CFTC IMM commitment of traders’ report which showed that net aggregate dollar speculative positioning (vs. EUR, JPY, GBP, AUD, NZD, CAD and CHF) improved for the first time in five weeks.  It is not inconceivable that investors have continued to cover short positions over the last few days.  

Nonetheless, it is difficult to ignore the possibility that currency market dynamics may be shifting back towards interest rate differentials as a key FX driver.  Over recent months the interest rate / FX relationship had all but broken down as reflected in very low and insignificant correlations between interest rate differentials and various currency pairs.  This could be changing and as interest rate markets begin to price in higher rates the relationship with currency markets may once again be strengthening.  

The risk for the dollar is that this tightening in US interest rate expectations looks premature.   It seems highly unlikely that the Fed will raise rates this year which points to the risk of a turnaround in rate expectations at some point over coming weeks and months.  In turn this suggests that the dollar could come under renewed pressure in the event of a dovish shift in US interest rate markets.  Even so, this is a factor to consider further out.  Over the next few days such a shift is unlikely and the dollar is likely to hold onto and even extend its gains as markets continue to ponder the probability that the Fed tightens policy sooner rather than later.