HubSpot shares rallied 9% on Tuesday after CNBC's David Faber reported that Alphabet is looking at an all- stock offer for the software company. Reports of a potential deal first surfaced in early April, when Reuters published a story saying Alphabet was talking to advisors about making an offer for HubSpot. Bloomberg followed with a story earlier this month, indicating that talks were progressing. "There have been many reports about HubSpot being in conversations with Google," Faber said Tuesday. "My under ...