The Ego, The Market, and The Mania

In early August, Standard & Poor’s downgraded US government debt from a top-rated AAA to AA+.1 In the weeks preceding the event, some market observers expected a downgrade to result in higher interest rates and lower stock returns.

After the downgrade, yields on US government securities fell across the term spectrum as investors around the world fled to the safe haven of US bonds. US stocks experienced negative returns in the following weeks but logged positive performance from the day of the downgrade to month end.2

These events raise questions about whether changes in sovereign debt ratings impact the financial markets. The short answer is that results are mixed, and that many other factors affect a country’s cost of capital and stock market returns.

Regarding bond markets, history offers examples of major developed countries that experienced a credit downgrade without a significant rise in interest rates.3 Examples include Australia, Canada, and Japan, which lost their top ratings in 1986, 1992, and 1998, respectively.

Other research suggests that countries with high credit ratings may withstand a downgrade better than countries with lower ratings. One study looked at sovereign credit rating downgrades since 1990 and found that bond yields changed little among countries downgraded from the highest triple-A rating. However, countries with lower credit ratings (single A or below) experienced significant interest rate increases following their downgrade.4

Stock market impact

Another question is whether the US downgrade has played a role in the US market downturn—and research does not provide convincing evidence.

Below is a chart that summarizes stock market performance of respective countries before and after a ratings change. It is based upon a study of ratings changes made by Moody’s from 1983 to 2009. During the twenty-seven-year period, the ratings agency made seventy-one upgrades and twenty-five downgrades to governments in the developed and emerging markets tracked by MSCI.

The study identified the date of each change and logged each country’s market performance in the twelve months before and twelve months after the event. Each country’s market returns were compared to the respective market index and the excess return averaged for all events. (Excess return refers to performance above or below the respective market index, either MSCI EAFE or MSCI Emerging Markets, as appropriate.)

The aggregate results show that stock markets of upgraded countries outperformed their respective market index in the twelve months before the rating change (13.83%), while stocks in downgraded countries aggregately underperformed the market index before the event. However, cumulative returns in the twelve months following a ratings change were almost the same for the upgraded and downgraded countries (3.87% vs. 3.73%).5

These results suggest that market prices reflect all available information and expectations about a country’s economic prospects—including the possibility of a ratings change. By the time a country’s debt rating is upgraded or downgraded, the market has already integrated the news into prices. Stock markets reflected positive economic developments prior to a ratings upgrade and negative developments before a ratings downgrade. After the event, markets did not appear to perform much differently, in aggregate.

Conclusion

This research underscores the importance of looking to market prices for signals about the fiscal health and prospects of a country or a company. Based on the foregoing analysis, markets appear to work faster and more accurately than ratings firms to assess a country’s financial condition and evaluate the potential impact on its cost of capital and equity market.

Endnotes:

1. A sovereign credit rating is an assessment of a government’s ability to pay its debts. The US had held S&P’s top rating since 1941. S&P made the announcement after business hours on Friday, August 5, but word of the downgrade leaked during the day. Although timing of the announcement was a surprise, the downgrade was mostly expected, as S&P had issued a negative long-term outlook for the US in April and July. The other top credit agencies, Moody’s Investors Service and Fitch Ratings, have maintained top ratings for the US.

2. Two weeks following the downgrade, the US market, as measured by the Russell 3000 Index, logged a negative 6.82% return (August 5– 19). However, from the day of the announcement to month end, the market returned a positive 1.6%. Russell data copyright © Russell Investment Group 1995–2011, all rights reserved.
3. Tom Lauricella, “Lessons of Lower Ratings,” Wall Street Journal, July 30, 2011.
4. Ivan Rudolph-Shabinsky and Dennis Shen, “When ‘Risk-Free’ Isn’t Risk Free: The Impact of a US Treasury Downgrade” (white paper, Alliance Bernstein, June 2011), www.alliancebernstein.com/CmsObjectABD/PDF/Research_WhitePaper/Treasury-Downgrade_110706.pdf.
5. The twelve-month aggregate excess performance prior to the ratings change was statistically significant, while the twelve-month returns after the ratings change were not.

Disclaimer:

The information presented above was prepared by Dimensional Fund Advisors, a non-affiliated third party. Diversification neither assures a profit nor guarantees against loss in a declining market.

Past performance is no guarantee of future results. All expressions of opinion are subject to change without notice in reaction to shifting market conditions. This article is distributed for informational purposes, and it is not to be construed as an offer, solicitation, recommendation, or endorsement of any particular security, products or services.

Dimensional Fund Advisors LP is an investment advisor registered with the Securities and Exchange Commission.

As government spending hits record levels around the globe, some politicians, economists, and pundits are warning that rising indebtedness may drag down economies and financial markets. This issue has raised concern among investors who assume that a government’s fiscal policy is closely linked to the country’s economic growth and market returns.

The graph below shows the projected state of indebtedness around the world.1 Over half the Organization of Economic Co-operation and Development (OECD) member countries expect to have debt-to-GDP levels above 70%—and the US, Canada, and the UK project debt levels exceeding 80% of their economic output.

Government efforts to stimulate these economies out of recession may partly explain this level of borrowing, which is high compared to historical levels. But longer-term trends such as aging populations, expanding public pensions, and rising health care obligations are compounding the fiscal challenges of these countries.

Global investors may be particularly concerned about the economics of government spending in countries around the world. So how does public debt affect economic growth and market returns? The evidence might surprise you. Although rising levels of government debt create headwinds for economic growth, a country’s deficit and debt levels do not seem to adversely impact capital market returns.

Let’s explore these issues by addressing a few popular questions about sovereign debt:

Do rising deficits drive up interest rates?
Yes. As borrowing increases, a government must offer higher interest rates on its debt to compete for capital. The public sector consumes savings and investment that may have otherwise fueled private sector growth—a displacement of resources known as the “crowding out effect” in economic theory. Additionally, as debt levels rise, market concerns about higher default and inflation risks put additional upward pressure on interest rates.

Consistent with this theory, our analysis shows that current interest rates reflect expectations of future deficits2 but that current government deficits and debt do not predict future interest rates or bond returns.3 So, long-term interest rates rise when the market expects future deficits to increase. However, today’s interest rates and bond prices already reflect information about current government spending, and markets quickly incorporate new information.

Do higher deficits hamper economic growth?
It depends on a country’s debt level. Using World Bank data from 1991 to 2008, we compared current deficits to future GDP growth in sixty-seven countries and found an increasing interactive effect between deficits, debt, and economic growth. High-debt countries that run deficits are more likely to experience lower economic growth over the next three years. But numerous forces may affect a country’s economic direction, and deficits explain only a small fraction of the variation in future GDP growth. The combination of high debt and deficits can create headwinds for economic expansion, but slower growth is not guaranteed.

So investors are justified in having some economic concern about higher government spending and borrowing. But the impact on investment returns is less clear. Let’s now consider the potential effect on equity markets.

Does low economic growth result in diminished equity returns?
No. This relationship can be tested by comparing a country’s GDP growth to its equity market performance in subsequent years. We conducted this analysis using all the developed countries in the MSCI universe, divided each year into high-growth and low-growth “portfolios” based on growth in real GDP. There was no statistical difference between the annual returns of equity markets in high-growth versus low-growth countries. In fact, low-growth countries had slightly higher average returns than high-growth countries.
The graph below illustrates this relationship in terms of a dollar invested in high- versus low-GDP growth portfolios from 1971 to 2008. The low-GDP growth portfolio’s higher annual return would have generated slightly more wealth for the period. The chart details the average annual return and real GDP growth for both groups.

Applying the same methodology to the MSCI emerging market countries shows an even greater return difference, although the data period is much shorter (2001 to 2008). The return of the high-growth country portfolio averaged 19.77% (with 2.5% GDP growth), versus 24.62% for the low-growth portfolio (-4.94% GDP growth).

Other research has confirmed a weak relationship between a country’s economic growth and its stock market returns.4 Several factors may contribute to this decoupling effect. For one, with globalization, a multinational company’s stock price in its home market may not reflect economic conditions in other countries. Also, the fruits of economic growth do not accrue exclusively to public companies, but also to income earners, non-public businesses, and private investments.

Finally, consider that risk, not economic growth, determines a stock’s expected return. Research indicates that this principle also applies to a country’s stock market.5 Similar to value and growth stocks, markets with a low aggregate price (relative to aggregate earnings or book value) have high expected returns, and markets with a higher relative price have lower expected returns. Consequently, while holding a “growth market” may be a rational investment approach, investors should not expect to earn higher returns by tilting their portfolios toward countries with high expected GDP growth.

Do fiscal deficits lead to currency depreciation?
No. It is commonly believed that large fiscal deficits and high debt cause a currency to depreciate as the government borrows more from foreign sources, and investors who are concerned about inflation and default risk flee the currency. Although recent developments in the US would seem to support this relationship, there is less convincing long-term evidence that deficits affect currency rates. During the 1970s and 1980s, the dollar strengthened while the government increased deficit spending.6 This observation is consistent with academic studies concluding that exchange rates appear to move randomly, and there are no models to date that can reliably forecast currency returns.7

Conclusions

Some economists claim that developed market countries are moving into an era of high government deficits and lower market returns. While higher deficits and debt may impact a nation’s interest rates and economic growth to some extent, the investment implications are not easily discerned. History does not offer strong evidence that current deficits predict future bond or equity returns in a country’s financial markets, or anticipate short-term currency movements.

Investors should assume that stock and bond prices reflect all that is currently known and expected about government spending and debt, economic growth, risk, and other issues affecting performance.

Endnotes

1.  The Organization of Economic Co-operation and Development (OECD) is an international economic organization of thirty-three countries founded in 1961 to stimulate economic progress and world trade. It defines itself as a forum of countries committed to democracy and the market economy.

2. Today’s interest rates reflect expectations of future deficit levels. The analysis compared five-year US deficit projections (as a percent of GDP) to yield spreads (five-year US Treasuries minus three-month US Treasuries) from 1992 to 2010. The yield spread increased 29 basis points for every one percentage-point increase in projected deficits. Data sources: Baseline projected deficits from the Congressional Budget Office; yields from Federal Reserve Bank of St. Louis.

3. Today’s deficits do not predict tomorrow’s interest rates or bond returns. Regression results show that current deficits do not reliably predict changes in the five-year US Treasury yield spread (1982 to 2009) or future bond returns (1947 to 2009). Data source: Federal Reserve Bank of St. Louis.

4. MSCI Barra Research Bulletin, “Is There a Link Between GDP Growth and Equity Returns?” May 2010.

5. Clifford S. Assness, John M. Liew, and Ross L. Stevens, “Parallels between the Cross-Sectional Predictability of Stock and Country Returns,” Journal of Business 79, no. 1 (March 1996): 429–451. Their research uncovered strong parallels between the explanatory power of aggregate book-to-market and aggregate earnings-to-price ratios for country stock markets.

6. Another common assumption is that current account deficits and currency appreciation are related. (The current account balance is the difference between a country’s receipts and payments to the world. This account is composed mostly of the balance of trade, with net income and foreign aid playing a smaller role.) Academic research yields equivocal results on whether this relationship holds.

7. Richard A. Meese and Kenneth Rogoff, “Empirical exchange rate models of the seventies: Do they fit out of sample?” Journal of International Economics 14, no. 1 (February 1983): 3–24. Kenneth Rogoff and Vania Stavrakeva, “The Continuing Puzzle of Short Horizon Exchange Rate Forecasting” (National Bureau of Economic Research working paper No. 14071, June 2008).

Disclaimer

The information presented above was prepared by Dimensional Fund Advisors, a non-affiliated third party. Diversification neither assures a profit nor guarantees against loss in a declining market.

Dimensional Fund Advisors is an investment advisor registered with the Securities and Exchange Commission. This material is provided for informational and educational purposes only. It should not be considered investment advice or an offer to buy or sell securities.