Economists like Nouriel Roubini are starting to fret about a US debt crisis as interest rates rise – here's why it's the latest issue rattling markets
A credit crunch caused by a spike in repayment costs could fuel "the mother of all economic crises," 'Dr Doom' economist Nouriel Roubini warned last week.
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### Instruction: Economists like Nouriel Roubini are starting to fret about a US debt crisis as interest rates rise – here's why it's the latest issue rattling markets

### Response: A credit crunch caused by a spike in repayment costs could fuel "the mother of all economic crises," 'Dr Doom' economist Nouriel Roubini warned last week.