Scrutinize the data and tweets to envisage if the closing price of $cvx will swell or contract at 2017-08-21. 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
2017-08-07,0.0,0.5,-0.2,-0.3,-0.3,0.3,-1.3,-2.7,-3.3,-3.7,-3.9
2017-08-08,-0.3,0.3,-0.5,0.5,0.5,-0.3,-1.3,-2.8,-3.5,-4.0,-4.2
2017-08-09,-0.1,0.5,-0.6,0.5,0.5,-0.7,-1.2,-2.9,-3.7,-4.3,-4.5
2017-08-10,1.0,1.2,-0.1,-0.7,-0.7,0.1,-0.2,-1.8,-2.7,-3.4,-3.6
2017-08-11,0.9,1.2,-0.1,-0.8,-0.8,0.8,0.7,-0.7,-1.7,-2.4,-2.7
2017-08-14,0.5,1.0,-0.4,-0.5,-0.5,1.1,1.2,0.1,-1.0,-1.7,-2.1
2017-08-15,0.2,0.3,-1.0,-0.1,-0.1,0.9,1.1,0.5,-0.7,-1.4,-1.9
2017-08-16,0.7,1.0,-0.1,-1.6,-0.6,0.9,1.5,1.3,0.1,-0.6,-1.2
2017-08-17,0.7,0.9,-0.0,-0.9,-0.9,1.2,2.1,2.2,1.1,0.4,-0.2
2017-08-18,-0.6,0.8,-0.9,0.5,0.5,0.4,1.4,1.7,0.7,-0.1,-0.6

2017-08-07: new capital management lp has $156,000 stake in chevron corporation $cvx |south texas money management ltd. boosts position in chevron corporation $cvx |richard bernstein advisors llc has $9,282,000 p
2017-08-08: market commentary for wednesday, aug 09 - $chtr, $apa, $tcmd, $fosl, $fgen, $cvx, $fb, $rl, $kite, $true, $xom, $it |u.s. oil producers reassured by kazakhstan on key projects  $cvx $xom $lukoy $lukof
2017-08-09: AT_USER AT_USER AT_USER AT_USER AT_USER AT_USER oil could see $150 barrel trump a weak pathetic leader oil shocks #oil $oil $xom $bp $cvx $cop $oih|good life advisors llc raises stake in chevron corpo
2017-08-10: i pair these 22 stocks with 7 etfs to create a diversified global portfolio. $aapl $abbv $cost $csco $cvx  - 1/2|price moves vs expected moves $abx $upl $xom $cvx $aks $x $hun $slb $hal $vale $fcx $ch
2017-08-11: two sigma securities llc invests $1.27 million in chevron corporation $cvx |members trust co purchases new stake in chevron corporation $cvx |oppenheimer asset management inc. buys new position in che
2017-08-12: chevron corporation $cvx shares sold by first national bank of omaha |chevron corporation $cvx shares sold by first national bank of omaha |$cvx showing  the best technicals its sector  #zkblast #inde
2017-08-13: chevron corporation $cvx stake increased by stellar capital management llc |chevron corporation $cvx stake increased by stellar capital management llc |stellar capital management llc has $2.13 million
2017-08-14: chevron corporation $cvx stake raised by cribstone capital management llc |price moves vs expected moves $fcx $x $clf $rrc $rig $vale $xom $cvx $bp $chk $abx $wll  |$dal finding support in the 200ma,a
2017-08-15: #oil prices settle flat after testing three-week lows  #energy $cvx $xom vista partners¡­ |price moves vs expected moves $ete $upl $x $cvx $xom $mos $sn $hal $abx $fcx $chk $rig  |$cvx 18-aug-17 atm i
2017-08-16: shell, chevron top first region-wide u.s. gulf of mexico lease sale  $rds.a $rds.b $cvx|big call buyers  $mu $wmt $coty $enb $ftr $fcx $cab $cvx $fold $mchp $amat $baba $nflx $vstm $oke $jnj $pld $cbi
2017-08-17: chevron: top-tier oil major with huge potential $cvx |rt AT_USER chevron: top-tier oil major with huge potential  $cvx|rt seekingalpha "chevron: top-tier oil major with huge potential  $cvx|chevron: t
2017-08-18: kanawha capital management llc purchases 929 shares of chevron corporation $cvx |investors sell chevron corporation $cvx on strength after insider selling |notable analyst upgrades and downgrades for 
2017-08-19: chevron corp gets a sell rating from rbc capital $cvx |chevron corporation $cvx position lowered by roanoke asset management corp ny |chevron corporation $cvx shares sold by sheets smith wealth manage
2017-08-20: gradient investments llc has $6.93 million position in chevron corporation $cvx |gradient investments llc has $6.93 million position in chevron corporation $cvx |contrasting chevron corporation $cvx a
Answer:
Fall