Contemplate the data and tweets to guess whether the closing price of $bhp will surge or decline at 2015-07-28. Please declare either Rise or Fall.
Context: date,open,high,low,close,adj-close,inc-5,inc-10,inc-15,inc-20,inc-25,inc-30
2015-07-14,1.3,1.3,-0.1,-1.4,-1.4,-2.0,-0.7,2.4,4.2,4.9,5.6
2015-07-15,1.7,1.9,-0.8,-1.7,-1.7,0.6,0.6,3.2,5.4,6.4,6.9
2015-07-16,1.2,1.3,-0.2,1.4,1.4,-0.1,-0.9,1.0,3.5,4.6,5.1
2015-07-17,1.0,1.3,-0.4,-0.7,-0.7,0.7,-0.7,1.1,3.6,4.9,5.5
2015-07-20,0.6,0.9,-0.2,-1.1,-1.1,1.1,0.3,1.6,4.2,5.6,6.3
2015-07-21,-1.0,1.2,-1.2,1.4,1.4,-0.5,-0.9,-0.2,2.2,3.8,4.6
2015-07-22,1.4,1.9,-0.3,-5.0,-5.0,3.9,4.4,4.6,6.6,8.7,9.7
2015-07-23,2.7,2.9,-0.7,-2.1,-2.1,4.5,6.2,6.1,7.9,10.3,11.4
2015-07-24,0.7,0.7,-1.4,-1.7,-1.7,4.5,7.1,7.0,8.8,11.3,12.7
2015-07-27,0.5,1.5,-0.5,0.1,0.1,2.9,5.9,6.4,7.8,10.4,12.0

2015-07-14: vale’s "cut" not likely to improve iron ore prices  $vale $bhp $rio|rt AT_USER .AT_USER shares soar - now worth more than $bhp, $cba, woolworths combined, says AT_USER  
2015-07-16: vale's designs on #china add to rio, bhp drive for more iron ore  $rio $bhp $vale5 #ironor… 
2015-07-17: our penny stock picks have gained 3,600% in 9 months! subscribe to get our future picks:  $bhp $cadx $bsx
2015-07-22: $bhp 
2015-07-24: bhp proshares ultra nasdaq biotechnology last trade$bhp $cem $dis $amda #bhp #stocks #finance|hyg ishares iboxx high yield corporate bond fund market cap$hyg $bhp $ait $iyr #hyg #tradeideas #stocks
2015-07-25: bhp bhp billiton ltd. volume$bhp $gld $rdw.l $amba #bhp #nasdaq #tradeideas
Answer:
Rise