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When to buy and sell bonds
Why does selling a bond drive up the yield? The bond will pay back a fixed amount when it comes due. The yield is a comparison of what you pay for the bond and what will be repaid when it matures (assuming no default). Why does the yield go up if the country is economically unstable? If the country's economy is unstable, that increases the chance that they will default and not pay the full value of the bonds when they mature. People are selling them now at a loss instead of waiting for a default later for a greater loss. So if you think Greece is not going to default as it's highly likely a country would completely default, wouldn't it make sense to hold onto the bonds? Only if you also think that they will pay back the full value at maturity. It's possible that they pay some, but not all. It's also possible that they will default. It's also possible that they will get kicked out of the Euro and start printing Drachmas again, and try to pay the bonds back with those which could devalue the bonds through inflation. The market is made of lots of smart people. If they think there are reasons to worry, there probably are. That doesn't mean they can predict the future, it just means that they are pricing the risk with good information. If you are smarter than the herd, by all means, bet against them and buy the bonds now. It can indeed be lucrative if you are right, and they are wrong.