It took 7 weeks after the 2012 halving for the price to start to rise significantly

Week2012Price2016PriceHALVING28-Nov-121209-Jul-16651WEEK 105-Dec-121316-Jul-16664WEEK 212-Dec-121423-Jul-16655WEEK 319-Dec-121430-Jul-16WEEK 426-Dec-121306-Aug-16WEEK 502-Jan-131313-Aug-16WEEK 609-Jan-131420-Aug-16WEEK 716-Jan-131527-Aug-16WEEK 823-Jan-131803-Sep-16WEEK 930-Jan-132010-Sep-16WEEK 1006-Feb-132117-Sep-16WEEK 1113-Feb-132424-Sep-16WEEK 1220-Feb-133001-Oct-16 via /r/Bitcoin http://bit.ly/2arIcMJ