But Sakhrani has a rosier view of Visa's prospects. After meeting with Jack Carsky, Visa's head of investor relations, the analyst in a note on Wednesday wrote "We came away believing investors should use the recent relative weakness in V shares as a buying opportunity."
"There is no doubt that if dual badging is allowed for signature debit, this would lead to a diminution of Visa's premium real estate on the majority of debit cards in the market; however, there is no certainty that a similar phenomenon would be seen in terms of volumes," Sakhrani added, citing the difficulty and costliness for merchants to "make dual badging on signature possible."
After all, if Judge Leon's decision on non-exclusivity holds, it's perfectly reasonable to expect some merchants to elect not to make the systems enhancements needed to allow them network choice for every single transaction.
Sakhrani backed up his view by pointing out that "the current plastic cards do not support having two card accounts on the magnetic stripe that is swiped at point of sale terminals. Given the lengthy timeline for implementation due to current technological challenges, it begs the question as to why it wouldn't make more sense to look towards the EMV conversion as being a means of compliance given chip technology is able to support dual signature bugs on one card."
In other words, merchants, banks and even customers would have quite a bit of legwork to do, before Visa were to see a major threat to its debit card processing market share from Judge Leon's ruling.
Sakhrani reiterated is "outperform" rating for Visa. KBW's price target for the shares is $217, implying 22% upside for the shares over the next 12 months. He estimates Visa will earn $7.61 a share during fiscal 2013, which ends on Sept. 30, with EPS rising to $8.88 in fiscal 2014.
Shares of Visa were down 2% in early trading Thursday to $174.99, while MasterCard was also down 2%, to $618.75.
Interested in more on Visa? See TheStreet Ratings' report card for this stock.
-- Written by Philip van Doorn in Jupiter, Fla.