Why Treasury yields are at 20-year highs – and why it matters

A sustained sell-off in the bond market sent long-term Treasury yields to their highest levels in nearly 20 years this week, rattling both Wall Street and Washington. Higher yields, essentially the interest rate the government pays to borrow money, also mean higher borrowing costs throughout the economy, from mortgages to car loans. Amna Nawaz discussed more with The Washington Post's David Lynch.…