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Sambong1

$SPY compared to $IYR

SPDR S&P 500 ETF TRUST (BATS:SPY)  
Sambong1  
BATS:SPY   SPDR S&P 500 ETF TRUST
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both have been in sync with each other since 2009 except 2013 may deep for IYR versus SPY. not sure what it means just found it interesting.
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