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- There's a growing risk of a stock market melt-up, according to market veteran Ed Yardeni.
- Yardeni said the return of the "Fed Put" means stocks could soar on the anticipation and realization of interest rate cuts.
- But stock market melt-ups are rarely sustainable and are often followed by a painful decline.
There's a growing risk that the Federal Reserve could spark a stock market melt-up, according to market veteran and investment strategist Ed Yardeni.