"Risk-free" is a theoretical concept. Roughly speaking, it's an assumption used to simplify financial equations, analogous to assuming "no friction" in high-school physics problems when the friction coefficient is small enough.
The usual rationale for assuming that a country will always pay back its debts is that it can print its own currency at will. But this is not the case for the euro, since an individual member country cannot freely print euros. It's also not the case for dollar-denominated bonds issued by emerging countries. Indeed, even bonds issued by the two largest and more stable powers in the world (US and Japan) aren't 100% risk-free. They might be able to keep borrowing money and not defaulting, but likely at the cost of inflating their currencies, i.e, investors still get the nominal dollars and yen back, but they will be worth less in terms of goods. The closest thing to risk-free is an US Treasure bill.
No asset class is completely risk-free, and bonds are no exception. The yield on a bond is meant to be reflective of its risk factor. But in practice, sovereign debt default is rare and the yield so low that buying bonds is equivalent to leaving your money in the bank - a riskier proposition in some countries than others, but an inherently conservative investment all the same. In absolute terms, they're risky, but so is putting your money under the mattress. In relative terms, they're the investment equivalent of the savings account: nobody buys bonds in a politically stable country with the expectation of losing money on the deal, they buy them to keep pace with inflation.
I agree with you that, two years ago, Bond (or, for that matter, Municipal or state bonds in the US) debt in politically stable countries was seen as very low risk.
But, in 2006, Real Estate was seen as a safe investment as well. In fact, I was openly mocked, not just debated, but mocked, as being uneducated and unsophisticated when I tried to draw parallels with the US Real Estate Market and what had happened in Japan, just 10 years earlier, in attempting to suggest that perhaps Real Estate doesn't "Always go up."
If the last 4-5 years has taught us anything, it's that there is risk in everything. One of the few bastions that still seems to remain standing is people's belief in the FDIC, and the fact that if they put their money in a US Bank, that they are protected up to $250,000.
People need to realize that there are no "Risk Free" investments, that everything has a chance of default. People need to start relying on Capital Asset Pricing Models (CAPM), and diversifying their investments across a broad portfolio - including hard stock such as land, livestock, and shelter. This is the only rationale response in the face of default risk that we are surrounded by - and the sooner we start practicing that consistently, the sooner we will become more resilient as a society.
I don't fully agree with you about CAPM. Not about it being the smart strategy, but about everyone needing to practice it. I enjoy economics as a hobby but actually doing CAPM evaluations makes my head hurt. It's not realistic or even productive to expect everyone to be an economist. I'm studying law, and while I think life would be an awful simpler if everyone else knew more law and thought like a lawyer, the fact is that most people don't find it all that interesting and it's more rational for them to outsource their legal problems to a legal nerd in most cases. I'm probably interpreting 'people' in a much broader sense than you meant it; it just strikes me that our aggregate productivity is to some extent dependent on the trustworthiness and prudence of our institutions, and it's not irrational to want an institutional framework that rewards fiscal prudence so as to make time available for other activities.
Given the fact that bonds regularly default, I'm not sure how any sane investor could consider them risk-free. If they were, every bond would trade at identical yields, equal to the risk-free rate of return.
Agreed. I'd be livid right about now if I held Greek bonds. Although I suppose anyone looking for shelter in the form of government bonds could have taken the next step and diversified across nations, further reducing their exposure.
Greek bond chart: http://www.bloomberg.com/quote/GGGB1YR:IND/chart German bond chart: http://www.bloomberg.com/quote/GDBR1:IND/chart
Go back out 3 years, and you'll see that as late as December 2009, the yield spread was minor, and that it didn't start to really diverge until July of this year.