Examine the data and tweets to deduce if the closing price of $nvs will boost or lower at 2015-07-21. Kindly confirm either Rise or Fall.
Context: date,open,high,low,close,adj-close,inc-5,inc-10,inc-15,inc-20,inc-25,inc-30
2015-07-07,-0.5,0.2,-1.8,0.6,0.6,-0.3,0.6,1.1,1.5,1.8,2.2
2015-07-08,0.4,0.7,-0.3,-0.1,-0.1,-0.0,0.4,1.1,1.5,1.8,2.2
2015-07-09,1.0,1.3,-0.0,1.0,1.0,-0.7,-0.7,0.0,0.4,0.7,1.1
2015-07-10,0.6,0.7,-0.2,3.2,3.2,-3.1,-3.6,-2.9,-2.7,-2.4,-2.1
2015-07-13,0.5,0.5,-0.3,0.9,0.9,-2.9,-4.0,-3.5,-3.4,-3.2,-2.8
2015-07-14,-0.7,0.1,-0.9,1.7,1.7,-3.3,-5.0,-4.9,-4.8,-4.7,-4.4
2015-07-15,0.9,0.9,-0.2,-1.6,-1.6,-0.7,-2.9,-3.3,-3.1,-3.0,-2.9
2015-07-16,-0.2,0.3,-0.4,1.5,1.5,-1.1,-3.6,-4.5,-4.3,-4.3,-4.2
2015-07-17,-0.6,0.0,-0.7,-0.0,-0.0,-0.6,-3.0,-4.2,-4.1,-4.2,-4.1
2015-07-20,0.6,0.7,-0.4,0.3,0.3,-0.5,-2.6,-4.1,-4.1,-4.3,-4.3

2015-07-09: rt AT_USER after entresto, maybe innovation?  $nvs $cyad $amgn $agn $trvn $mrk
2015-07-13: watch: latest #pharma daily news round-up video - fda, $nvo, semaglutide, $abbv, imbruvica, $nvs, entresto
2015-07-18: anacor pharmaceuticals: the devil you don't know  $celg $nvs $prgo $regn $vrx $pfe $anac
Answer:
Examine the data and tweets to deduce if the closing price of $nvs will boost or lower at 2015-07-21. Kindly confirm either Rise or Fall.
Context: date,open,high,low,close,adj-close,inc-5,inc-10,inc-15,inc-20,inc-25,inc-30
2015-07-07,-0.5,0.2,-1.8,0.6,0.6,-0.3,0.6,1.1,1.5,1.8,2.2
2015-07-08,0.4,0.7,-0.3,-0.1,-0.1,-0.0,0.4,1.1,1.5,1.8,2.2
2015-07-09,1.0,1.3,-0.0,1.0,1.0,-0.7,-0.7,0.0,0.4,0.7,1.1
2015-07-10,0.6,0.7,-0.2,3.2,3.2,-3.1,-3.6,-2.9,-2.7,-2.4,-2.1
2015-07-13,0.5,0.5,-0.3,0.9,0.9,-2.9,-4.0,-3.5,-3.4,-3.2,-2.8
2015-07-14,-0.7,0.1,-0.9,1.7,1.7,-3.3,-5.0,-4.9,-4.8,-4.7,-4.4
2015-07-15,0.9,0.9,-0.2,-1.6,-1.6,-0.7,-2.9,-3.3,-3.1,-3.0,-2.9
2015-07-16,-0.2,0.3,-0.4,1.5,1.5,-1.1,-3.6,-4.5,-4.3,-4.3,-4.2
2015-07-17,-0.6,0.0,-0.7,-0.0,-0.0,-0.6,-3.0,-4.2,-4.1,-4.2,-4.1
2015-07-20,0.6,0.7,-0.4,0.3,0.3,-0.5,-2.6,-4.1,-4.1,-4.3,-4.3

2015-07-09: rt AT_USER after entresto, maybe innovation?  $nvs $cyad $amgn $agn $trvn $mrk
2015-07-13: watch: latest #pharma daily news round-up video - fda, $nvo, semaglutide, $abbv, imbruvica, $nvs, entresto
2015-07-18: anacor pharmaceuticals: the devil you don't know  $celg $nvs $prgo $regn $vrx $pfe $anac
Answer:+Fall