Scrutinize the data and tweets to envisage if the closing price of $gild will swell or contract at 2017-04-21. Please affirm either Rise or Fall.
Context: date,open,high,low,close,adj-close,inc-5,inc-10,inc-15,inc-20,inc-25,inc-30
2017-04-06,-0.1,0.5,-0.4,0.0,0.0,0.8,1.1,1.6,1.7,2.2,2.6
2017-04-07,-0.2,0.4,-0.5,0.2,0.2,0.2,0.8,1.2,1.5,1.8,2.3
2017-04-10,0.2,1.2,-0.0,-0.2,-0.2,0.2,0.8,1.2,1.7,1.9,2.4
2017-04-11,0.6,0.8,-0.3,-0.6,-0.6,0.6,1.3,1.6,2.1,2.3,2.8
2017-04-12,0.2,0.2,-0.6,0.3,0.3,0.2,0.8,1.1,1.7,1.8,2.3
2017-04-13,-0.5,0.5,-0.6,0.4,0.4,-0.2,0.2,0.6,1.1,1.3,1.7
2017-04-17,0.2,0.7,-0.1,0.3,0.3,-0.5,-0.2,0.2,0.6,1.0,1.3
2017-04-18,0.8,1.2,-0.5,-1.0,-1.0,0.4,0.6,1.1,1.4,1.8,2.1
2017-04-19,-0.1,0.2,-0.6,0.3,0.3,0.1,0.1,0.6,0.9,1.4,1.6
2017-04-20,-0.2,0.3,-0.5,0.3,0.3,-0.1,-0.2,0.2,0.5,1.0,1.1

2017-04-06: rt AT_USER $omer 52-week high, biotech still the place to be for long term investors, so many 20 year hundred baggers: $incy $celg $bi¡­|rt AT_USER $omer 52-week high, biotech still the place to be fo
2017-04-07: #gileadsciences gilead building hangzhou manufacturing facility  . read more:  $gild|AT_USER selling naked calls of $gild|gilead sciences, inc. $gild given overweight rating at jpmorgan chase &amp; co
2017-04-08: has gilead sciences lost its way? $gild  #dividend #investing |benzinga: anthrax and government contracts: pharmathene and altimmune ahead of merger  $azn $ebs $gild $pip $siga|anthrax and government 
2017-04-09: week in review: zai lab partners with ge on china biologics manufacturing  $gild $ilmn $fosuy|rt AT_USER repost: projected weekly ranges, select us stocks (april 10-14): $aapl $agn $amzn $bac $fb $goo
2017-04-10: has gilead sciences lost its way? $gild  #dividend #investing |free ebook "how to day trade" here:  |  $gild $mo $qqq $idti $sn $himx $panw $ebay $bmrn¡­ |$gild is in parabolic sar breakout winning 60
2017-04-11: unicorn bay rating for $gild is 3.73 out of 5. |throwing in the towel on gilead $gild // great company. horrible stock. wait till it's 50-55 per share. |AT_USER i'm starting to doubt streetinsider on 
2017-04-12: AT_USER earnings dont mean much in the market look at $gild $f $gm $ual etc the companies that are mature w/¡­ |04/12/17 volume leader #97 - gild 7,817,700 gilead sciences inc $gild 66.22 +0.20 +0.30%
2017-04-13: $gild i feel sorry for the sellers of gild stock at under $70. going to be over $130 within 2 years.. just on china revs and added eps.|$gild china will buy $4b to $6b of hcv annually when they get st
2017-04-14: AT_USER i own $abt and $gild.  was thinking of swapping one for $cvs as i need a staple.  leaning keep $abt.  your thoughts pls?|$incy bullish thesis appears far overdone now   $lily $gild|$googl #seo
2017-04-15: AT_USER i have 2 healthcare stocks: $abt &amp; $gild.  i want to swap 1 w/ $cvs.  which one would you swap out and ur thoughts on cvs?  thx!!!|$gild |rt AT_USER key presentations and posters at easl $
2017-04-16: why gilead sciences could be a gold mine for value investors  $gild |rt AT_USER $gild and $biib roa is way above peer average #stocks #biotech #investing $lly $jnj $celg |rt AT_USER $gild and $biib ro
2017-04-17: $gild possible short. - s: $66.61 / sl: $67.14 |$gild is in three outside up winning 66.67% in the past. |AT_USER thx jason!  $abt also announced another buyout today. $gild is a fav of mine just wond
2017-04-18: AT_USER AT_USER $gild tomorrow what?|rt AT_USER $gild says earnings will be may 2nd. live shot of the analyst/investor community if there's been no progress on the deal fr¡­|rt AT_USER $gild says earn
2017-04-19: AT_USER AT_USER yup, my thoughts exactly. money will flow from consumer discretionary to staples and healthc¡­ |curious if anyone has any thoughts on $gild|rt AT_USER incyte: buy on the drop?  $abbv $
2017-04-20: #gileadsciences gilead to present clinical and preclinical data on nonalcoholic steatohepat... read more:  $gild|rt AT_USER $gs : from 2011 to 2017 biotech cumulative market caps have increased by $50
Answer:
Fall