Loop Capital analyst Chris Kapsch speculates that W.R. Grace (GRA) is poised to pull the trigger on M&A and sees Chicago Bridge & Iron (CBI) as an "obvious fit" when the latter reports Q3 results early next week. Kapsch says W.R.Grace is the "most likely to succeed" as a suitor in the process and models about 60c of EPS accretion sans equity from the deal. The analyst also maintains his Buy rating and $81 price target on W.R. Grace following Q3 results, as the company overcame a $4M EBIT impact from Hurricane Harvey, adding the 7% increase in Catalyst segment volume comp is "encouraging."