Our largest demographic population on the planet, not just in the US, is the baby boomers born 1944 to 1964. Largely early baby boomers born during WWII and up to the late 1940's have already started collecting on retirements. For these seniors to live comfortably in retirement they will need to draw down on a steady income derived from higher US Bonds yields. Boomers can no longer afford to risk money in equity markets, they will be forced to invest conservative in fixed incomes.
US Political Movement
For more than 30 years the US has run up debts with both political parties at fault. However, more recently we are seeing a shift towards a popular following of younger fiscal conservatives in the Republican party. Many of these fiscal conservatives candidates govern states and have taken on the challenge of run away debt spending. Fiscal Conservatism will also appeal to the US largest voting class, baby boomers. Baby boomers are fully aware that more debts equals more instability in the US, and want to see a more fiscal responsible governments. To appease the baby boomers wishes, whoever it is that leads the US, they will implement a strategy of spending cuts and debt reductions. Spending cuts and debt reductions will also help US Treasury Yields increase.
Federal Reserve Raising Rates
Our own has been sounding off the warning now for almost a year, it's only a matter of time before Janet Yellen starts raising benchmark rates. Although US economy has entered another soft patch, which will require the Fed to talk down the rate increase in 2015. However, sometime in 2016 we will see our first rate increase in the US. I expect other countries like Great Britain to follow this trend of rate increases.
What you might misinterpret is the TLT put if yields go up statement. Puts are option contracts that take advantage of price going lower. In this case if there is an expectation of yields going up TLT will go down, so one would buy Puts.