One of Wall Street's biggest bulls is turning cautious on stocks

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Alico, Inc. (NYSE: LCO) Delayed: 28.73 +0.35 (1.23%)
Previous Close $28.38    52 Week High $4.99 
Open $28.73    52 Week Low $1.83 
Day High $28.73    P/E N/A 
Day Low $28.73    EPS $-1.37 
Volume      

PowerShares QQQ Trust, Series 1 (NASDAQ: QQQ) Delayed: 717.67 +8.43 (1.19%)
Previous Close $709.24    52 Week High $119.66 
Open $710.85    52 Week Low $94.84 
Day High $718.92    P/E N/A 
Day Low $709.69    EPS $0.00 
Volume 29,442,666       

S&P DEP RECEIPTS (NYSE: SPY) Delayed: 773.17 +8.01 (1.05%)
Previous Close $765.16    52 Week High $219.60 
Open $767.90    52 Week Low $181.02 
Day High $774.03    P/E N/A 
Day Low $767.45    EPS $0.00 
Volume 43,490,712