Bond markets determine the price in terms of yield that a borrower must pay in order to receive funding. In one notable instance, when President Clinton attempted to increase the US budget deficit in the 1990s, it led to such a sell-off (decreasing prices; increasing yields) that he was forced to abandon the strategy and instead balance the budget 1, 2.
“ I used to think that if there was reincarnation, I wanted to come back as the president or the pope or as a .400 baseball hitter. But now I would like to come back as the bond market. You can intimidate everybody. ”
— James Carville, political advisor to President Clinton, Bloomberg 3