Why are stock prices still rising? Yardeni explains

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ISHARES CORE S&P 500 ETF (NYSE: IVV) Delayed: 755.05 --0 (-0%)
Previous Close $755.05    52 Week High $220.88 
Open $755.05    52 Week Low $181.90 
Day High $755.05    P/E N/A 
Day Low $755.05    EPS $0.00 
Volume 8,153       

S&P DEP RECEIPTS (NYSE: SPY) Delayed: 751.71 --0 (-0%)
Previous Close $751.71    52 Week High $219.60 
Open $751.71    52 Week Low $181.02 
Day High $751.71    P/E N/A 
Day Low $751.71    EPS $0.00 
Volume 70,767