Mastering Inter-Market Analysis for Proactive Sector Rotation

Sector rotation strategies are often myopically focused on the equity market, analyzing the relative performance of different sectors in isolation. While this can be a profitable approach, it is inherently reactive. A more proactive and comprehensive approach involves the application of inter-market analysis, a field of study pioneered by John Murphy. Inter-market analysis is the study of the relationships between the four major asset classes: stocks, bonds, commodities, and currencies. By understanding these relationships, traders can gain valuable insights into the underlying strength or weakness of the economy and make more informed decisions about sector allocation.

The Four Asset Classes and Their Relationships

John Murphy's central thesis is that all markets are interrelated and that a change in one market will have a predictable effect on the others. These relationships are not random but are driven by the flow of capital between asset classes as investors and traders react to changes in economic conditions. The four major asset classes and their typical relationships are as follows:

• Bonds: The bond market, particularly the direction of interest rates, is a key driver of the business cycle. Rising interest rates are generally bearish for stocks, as they increase borrowing costs for companies and make bonds a more attractive alternative investment. Conversely, falling interest rates are bullish for stocks. The yield curve, as discussed in the previous article, is a important component of bond market analysis.

• Stocks: The stock market is a leading indicator of the economy, typically turning down before a recession and up before a recovery. The performance of different stock market sectors is also closely tied to the business cycle.

• Commodities: The commodity market, particularly industrial commodities like copper and oil, is also a leading indicator of economic activity. Rising commodity prices are often a sign of a strengthening economy, while falling prices can signal a slowdown. The CRB Index is a commonly used benchmark for the commodity market.

• Currencies: The currency market, particularly the US dollar, plays a significant role in the global flow of capital. A strong dollar is generally bearish for US stocks, as it makes US exports more expensive and reduces the value of foreign earnings. A weak dollar, on the other hand, is bullish for US stocks.

Inter-market Analysis and the Business Cycle

The relationships between the four asset classes are not static but evolve over the course of the business cycle. By understanding these cyclical relationships, traders can anticipate major turning points in the markets and position their portfolios accordingly.

The Idealized Business Cycle

In an idealized business cycle, the four asset classes top and bottom in a predictable sequence:

1. Bonds top first: As the economy reaches its peak, inflation starts to rise, and the central bank begins to tighten monetary policy. This leads to a top in the bond market (i.e., a bottom in interest rates).

2. Stocks top second: The stock market continues to rise for a period after the bond market has topped, but eventually, the impact of rising interest rates and slowing economic growth takes its toll, and the stock market rolls over.

3. Commodities top third: The commodity market is the last to top, as it is driven by the momentum of the economic expansion. Even as the economy begins to slow, demand for commodities can remain strong for a period.

4. The US Dollar bottoms: The US dollar often bottoms around the same time that the commodity market tops. This is because a slowing US economy and falling interest rates make the dollar less attractive to foreign investors.

The sequence is reversed at the bottom of the business cycle:

1. Bonds bottom first: As the economy enters a recession, the central bank begins to ease monetary policy, and interest rates fall. This leads to a bottom in the bond market.

2. Stocks bottom second: The stock market bottoms after the bond market, as investors begin to anticipate an economic recovery.

3. Commodities bottom third: The commodity market is the last to bottom, as it takes time for demand to recover.

4. The US Dollar tops: The US dollar often tops around the same time that the commodity market bottoms.

Applying Inter-market Analysis to Sector Rotation

Inter-market analysis provides a effective framework for making proactive sector rotation decisions. By monitoring the relationships between the four major asset classes, traders can identify the current stage of the business cycle and anticipate which sectors are likely to outperform.

Using Ratio Charts for Relative Strength Analysis

A key tool in inter-market analysis is the ratio chart, which plots the price of one asset relative to another. By analyzing the trend of the ratio, traders can determine the relative strength of the two assets. For example, a rising ratio of stocks to bonds (e.g., SPY/TLT) indicates that stocks are outperforming bonds, which is a bullish sign for the economy and the stock market. Conversely, a falling ratio indicates that bonds are outperforming stocks, which is a bearish sign.

This same technique can be used to analyze the relative strength of different stock market sectors. For example, a rising ratio of the Consumer Discretionary sector (XLY) to the Consumer Staples sector (XLP) indicates that investors are favoring cyclical stocks over defensive stocks, which is a sign of a healthy, expanding economy. A falling ratio, on the other hand, suggests that investors are becoming more defensive, which is a sign of a slowing economy.

A Practical Example

Let's consider a hypothetical scenario. A trader observes the following:

• The bond market (as measured by a long-term Treasury bond ETF like TLT) has been in a downtrend for several months, indicating that interest rates are rising.
• The stock market (as measured by the S&P 500) has been in an uptrend, but is starting to show signs of weakness.
• The commodity market (as measured by the CRB Index) has been in a strong uptrend.
• The US dollar has been in a downtrend.

Based on these observations, the trader can conclude that the economy is likely in the late stages of an expansion. The bond market has already topped, and the stock market is likely to be the next to top. The commodity market is still strong, but is likely to be the last to top. The weak dollar is also consistent with a late-stage expansion.

Given this analysis, the trader can make the following sector rotation decisions:

• Reduce exposure to cyclical sectors: The trader should reduce their positions in cyclical sectors like Technology (XLK), Consumer Discretionary (XLY), and Industrials (XLI), as these sectors are likely to underperform as the economy slows.

• Increase exposure to defensive sectors: The trader should increase their positions in defensive sectors like Health Care (XLV), Consumer Staples (XLP), and Utilities (XLU), as these sectors are likely to outperform in a slowing economy.

• Consider a position in the Energy sector: The Energy sector (XLE) often performs well in the late stages of an expansion, as rising commodity prices boost the earnings of energy companies.

By using inter-market analysis, the trader is able to make a proactive sector rotation decision, positioning their portfolio for the next stage of the business cycle before it has become obvious to the rest of the market.

Conclusion

Inter-market analysis is a effective tool that can help traders make more informed and proactive sector rotation decisions. By understanding the relationships between the four major asset classes, traders can gain valuable insights into the underlying strength or weakness of the economy and anticipate major turning points in the markets. The use of ratio charts for relative strength analysis provides a simple yet effective way to implement an inter-market approach to sector rotation. While no approach is foolproof, inter-market analysis provides a logical and disciplined framework for navigating the complexities of the financial markets.

References

[1] Murphy, J. J. (2004). Intermarket Analysis: Profiting from Global Market Relationships. John Wiley & Sons. [2] Murphy, J. J. (2012). Trading with Intermarket Analysis: A Visual Approach to Beating the Financial Markets Using Exchange-Traded Funds. John Wiley & Sons.