Commercial real estate could be where the next economic shock comes from. Here's what Elon Musk, Bill Ackman, and 5 others have predicted.

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• Fears are on the rise that commercial real-estate could be where the next economic shock could  emanate from.
• A combination of high interest rates, work-from-home trends and tighter credit conditions could hit commercial property owners, and their lenders, top voices have said. 
• Here's what Elon Musk, Bill Ackman, Jim Chanos and others have to say about the $2 trillion commercial building market. 

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