Analyze the information and social media posts to determine if the closing price of $exc will ascend or descend at 2015-07-21. Please respond with 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,-2.1,0.4,-2.1,2.6,2.6,-2.4,-1.9,-0.2,0.7,1.0,1.4
2015-07-08,-0.1,0.9,-0.6,-0.5,-0.5,-1.2,-1.5,0.1,1.2,1.4,1.8
2015-07-09,0.5,1.1,-0.5,-0.3,-0.3,-0.4,-1.2,0.0,1.2,1.6,2.0
2015-07-10,-0.8,0.5,-1.1,0.8,0.8,-0.7,-1.8,-1.0,0.2,0.7,1.1
2015-07-13,0.5,0.7,-0.8,-0.2,-0.2,-0.1,-1.4,-1.0,0.2,0.8,1.1
2015-07-14,0.0,0.5,-0.7,0.2,0.2,-0.3,-1.4,-1.4,-0.2,0.5,0.8
2015-07-15,-0.3,0.1,-1.0,0.2,0.2,-0.4,-1.2,-1.6,-0.6,0.2,0.4
2015-07-16,-2.2,0.3,-2.2,2.3,2.3,-2.0,-2.8,-3.6,-2.9,-2.1,-1.8
2015-07-17,0.3,0.9,-0.7,-0.3,-0.3,-1.2,-2.1,-3.0,-2.7,-1.9,-1.5
2015-07-20,0.1,0.1,-0.9,-0.3,-0.3,-0.5,-1.3,-2.5,-2.4,-1.6,-1.2

2015-07-09: weekly s&amp;p100 #stocks performance $so $mo $lly $exc $cost $spg $rtn $wmt $pg $pep $lmt $ebay $ko $ba $tgt  more@ 
2015-07-10: $exc: analyst action by suntrust robinson humphrey on exelon:  |efa ishares msci eafe index fund change$efa $exc $bbt $clb #efa #stocks #stocks|$exc:comed plans to launch satellite sites to continue a
2015-07-17: williams: "giving utilities credit when tax credit is due" | seeking alpha  AT_USER $so $scg $exc
2015-07-19: my full #journal for my #trading activities on $exc - fantastic 3.4% profit on my #trading account balance  #nyse
Answer:
Analyze the information and social media posts to determine if the closing price of $exc will ascend or descend at 2015-07-21. Please respond with 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,-2.1,0.4,-2.1,2.6,2.6,-2.4,-1.9,-0.2,0.7,1.0,1.4
2015-07-08,-0.1,0.9,-0.6,-0.5,-0.5,-1.2,-1.5,0.1,1.2,1.4,1.8
2015-07-09,0.5,1.1,-0.5,-0.3,-0.3,-0.4,-1.2,0.0,1.2,1.6,2.0
2015-07-10,-0.8,0.5,-1.1,0.8,0.8,-0.7,-1.8,-1.0,0.2,0.7,1.1
2015-07-13,0.5,0.7,-0.8,-0.2,-0.2,-0.1,-1.4,-1.0,0.2,0.8,1.1
2015-07-14,0.0,0.5,-0.7,0.2,0.2,-0.3,-1.4,-1.4,-0.2,0.5,0.8
2015-07-15,-0.3,0.1,-1.0,0.2,0.2,-0.4,-1.2,-1.6,-0.6,0.2,0.4
2015-07-16,-2.2,0.3,-2.2,2.3,2.3,-2.0,-2.8,-3.6,-2.9,-2.1,-1.8
2015-07-17,0.3,0.9,-0.7,-0.3,-0.3,-1.2,-2.1,-3.0,-2.7,-1.9,-1.5
2015-07-20,0.1,0.1,-0.9,-0.3,-0.3,-0.5,-1.3,-2.5,-2.4,-1.6,-1.2

2015-07-09: weekly s&amp;p100 #stocks performance $so $mo $lly $exc $cost $spg $rtn $wmt $pg $pep $lmt $ebay $ko $ba $tgt  more@ 
2015-07-10: $exc: analyst action by suntrust robinson humphrey on exelon:  |efa ishares msci eafe index fund change$efa $exc $bbt $clb #efa #stocks #stocks|$exc:comed plans to launch satellite sites to continue a
2015-07-17: williams: "giving utilities credit when tax credit is due" | seeking alpha  AT_USER $so $scg $exc
2015-07-19: my full #journal for my #trading activities on $exc - fantastic 3.4% profit on my #trading account balance  #nyse
Answer:+Fall