The Trade Desk stock falls after Amazon offers free DSP testing

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Amazon.com Inc (NASDAQ: AMZN) Delayed: 213.21 -5.73 (2.62%)
Previous Close $218.94    52 Week High $847.21 
Open $214.99    52 Week Low $474.00 
Day High $217.32    P/E 361.37 
Day Low $212.53    EPS $0.59 
Volume 51,334,094       

(NASDAQ: TTD) Delayed: 29.28 -0.51 (1.71%)
Previous Close $29.79    52 Week High $33.40 
Open $29.17    52 Week Low $22.00 
Day High $29.51    P/E N/A 
Day Low $28.04    EPS $0.00 
Volume 29,189,447