VIX term structure as a trading signal

The VIX futures curve reflects expectations of future implied volatility of S&P500 index options. The slope of the curve is indicative of expected volatility and uncertainty relative to volatility and uncertainty priced in the market at present. Loosely speaking, a steeply upward sloped VIX futures curve should be indicative of present market complacency, while an inverted downward sloped curve should be indicative of present market panic and capitulation. In both cases the slope of the curve would serve as a contrarian indicator for market directional positions. An empirical analysis for 2010-2017 suggests that an inverted VIX curves has had a significant positive relation with subsequent S&P500 returns. Normal VIX curves, however, did not have significant predictive power, possibly because a market can stay complacent longer than it can panic.

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FX carry strategies (part 2): Hedging

There is often a strong case for hedging FX carry trades against unrelated global market factors. It is usually not difficult to hedge currency positions – at least partly – against global directional risk and against moves in the EURUSD exchange rate. The benefits of these hedges are [1] more idiosyncratic and diversifiable currency trades and, [2] a more realistic assessment of the actual currency-specific subsidy or risk premium implied by carry, by applying hedge costs to the carry measure. Empirical analysis suggests that regression-based hedging improves Sharpe ratios, reduces risk correlation and removes downside skews in the returns of global FX carry strategies. Hedging works well in conjunction with “economically adjusted” FX carry and even benefits the performance of relative FX carry strategies that have no systematic risk correlation to begin with.

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FX carry strategies (part 1)

FX forward-implied carry is a valid basis for investment strategies because it is related to policy subsidies and risk premia. However, it also contains misdirection such as rational expectations of currency depreciation. To increase the signal-noise ratio FX carry should – at the very least – be adjusted for expected inflation differentials and external deficits. Even with such plausible adjustments FX carry is a hazardous signal for directional trades because it favours positions with correlated risks and great sensitivity to global equity markets. By contrast, relative adjusted carry has been a plausible and successful basis for setting up relative normalized carry trades across similar currencies. It has historically produced respectable Sharpe ratios and low directional risk correlation. Such strategies seem to generate alpha and exploit alternative risk premia alike.

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A simple rule for exchange rate trends

Over the past decades developed market exchange rates have displayed two important regularities. First, real exchange rates (nominal exchange rates adjusted for domestic price trends) have been mean reverting. Second, the mean reversion has predominantly come in form of nominal exchange rate trends. Hence, a simple rule of thumb for exchange rate trends can be based on the expected re-alignment the real exchange rates with long-term averages over 2-5 years. According to a new paper, FX trend forecasting models based on this rule outperform both the random walk and more complex forecasting models.

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Finding implicit subsidies in financial markets

Implicit subsidies in financial markets can be defined as expected returns over and above the risk free rate and conventional risk premia. While conventional risk premia arise from portfolio optimization of rational risk-averse financial investors, implicit subsidies arise from special interests of market participants, including political, strategic and personal motives. Examples are exchange rate targets of governments, price targets of commodity producers, investor relations of institutions, and the preference for stable and contained portfolio volatility of many households. Implicit subsidies are more like fees for services than compensation for standard financial risk. Detecting and receiving such subsidies creates risk-adjusted value. Implicit subsidies are paid in all major markets. Receiving them often comes with risks of crowded positioning and recurrent setbacks.

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Commodity pricing

A new paper combines two key aspects of commodity pricing: [1] a rational pricing model based on the present value of future convenience yields of physical commodity holdings, and [2] the activity of financial investors in form of rational short-term trading and contrarian trading. Since convenience yields are related to the scarcity of a commodity and the value of inventories for production and consumption they provide the fundamental anchor of prices. The trading aspect reflects the growing “financialization” of commodity markets. The influence of both fundamentals and trading is backed by empirical evidence. One implication is that adjusted spreads between spot and futures prices, which partly indicate unsustainably high or low convenience yields, are valid trading signals.

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Using yield curve information for FX trading

FX carry trading strategies only use short-term interest rates (and forward basis) as signal. Yet both theoretical and empirical research suggests that the whole relative yield curve contains important information on monetary policy and risk premia. In particular, the curvature of a yield curve indicates – to some extent – the speed of adjustment of the short rate towards a longer-term yield. Since relative curvature between two countries is therefore a measure of the relative trajectory of monetary policy it is a valid directional signal for FX trading. Indeed, recent empirical research suggests that this signal is statistically significant. A curvature-based trading rule produces higher Sharpe ratios and less negative skewness than conventional FX carry strategies.

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Fixed income carry as trading signal

Empirical evidence for 27 markets suggests that carry on interest rate swaps has been positively correlated with subsequent returns for the past two decades. Indeed, a naïve strategy following carry as signal has produced respectable risk-adjusted returns. However, this positive past performance masks the fundamental flaw of the carry signal: it disregards the expected future drift in interest rates and favours receiver position in markets with very low real rates. In the 2000s and 2010s this oversight mattered little because inflation and yields drifted broadly lower. If the inflation cycle turns or just stabilizes, however, short-term rates normalization should become very consequential. Indeed, enhancing the IRS carry signal by a plausible medium term drift in short rates has already in the past produced more stable returns and more convincing actual “alpha”.

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The correlation risk premium

The correlation risk premium is a premium for uncertainty of future correlation of securities among each other or with a benchmark. A rise in correlation reduces diversification benefits. The common adage that in a crash ‘all correlations go to one’ reflects that there is typically not much diversification in large market downturns and systemic crises, except through outright shorts. Correlation risk premia can be estimated based on option prices and their implied correlation across stocks. There is evidence that these estimates are useful predictors for long-term individual stock performance, over and above the predictive power of variance risk premia.

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How to prepare for the next systemic crisis

Systemic crises are rare. But they are make-or-break events for long-term performance and social relevance of investment managers. In systemic crises conventional investment strategies lose big. The rules of efficient positioning are turned upside down. Trends follow distressed flows away from best value and institutions abandon return optimization for the sake of preserving capital and liquidity. It is hard to predict systemic events, but through consistent research it is possible to improve judgment on systemic vulnerabilities. When crisis-like dynamics get underway this is crucial for liquidating early, following the right trends and avoiding trades in extreme illiquidity. Crisis opportunities favor the prepared, who has set up emergency protocols, a realistic calibration of tail risk and an active exchange of market risk information with other managers and institutions.

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