3) U.S. Bonds have dropped in value, even though in times of stress and market instability, they are normally bought (as a security blanket). They are going down in value, meaning our Bonds are no longer considered a "safety net".
There is some nervousness about the China dumping it bonds and lowering their value. From what I've read about the concern it goes like this explanation from Fox Business:
China holds $761 billion in U.S. debt, making it the second-largest foreign holder after Japan. A mass sell-off could drive down the value of U.S. bonds and cause yields to spike, sharply increasing borrowing costs for the federal government. It could also weaken the U.S. dollar and send shock waves through global financial markets.