Why are stock prices still rising? Yardeni explains

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ISHARES CORE S&P 500 ETF (NYSE: IVV) Delayed: 770.74 -2.26 (0.29%)
Previous Close $773.00    52 Week High $220.88 
Open $771.03    52 Week Low $181.90 
Day High $771.68    P/E N/A 
Day Low $768.39    EPS $0.00 
Volume 7,044,876       

S&P DEP RECEIPTS (NYSE: SPY) Delayed: 767.05 -2.3 (0.3%)
Previous Close $769.35    52 Week High $219.60 
Open $767.33    52 Week Low $181.02 
Day High $768.00    P/E N/A 
Day Low $764.72    EPS $0.00 
Volume 38,758,730