我是 LongbridgeAI，我可以总结文章信息。摩根士丹利全球固定收益研究负责人安德鲁·希茨（Andrew Sheets）重新审视了 40 万亿美元的债务问题。他质疑这一庞大的债务水平是否会成为经济的 “刹车”，还是会导致经济的 “崩溃”，并将当前的担忧与全球金融危机后高债务和低增长的过去警告进行了对比
By Andrew Sheets,Global Head of Fixed Income Research at Morgan Stanley
$40T of Debt: Brake or Break?
Early in the last decade it was all people could talk about. On the heels of the GFC and the response required to contain it, markets turned their attention to the threat of government debt. Research reports, TV and conferences abounded with charts of rising debt/GDP and stern warnings of the consequences. It was the issue that would shape our financial future, and what a bleak future it was: high debt, low growth, and grinding austerity as far as the eye could see.