LPL Financial's shares leapt higher yet again Thursday to finish above $40, up from about $31 as recently as Nov. 3.

This time, it had Chuck to thank.

The Charles Schwab Corp. is the latest company rumored to be in the mix as a buyer for the Boston-based broker-dealer for 14,000 advisors. See: LPL shares spike despite CFO downplay of buyout prospects as CEO Mark Casady reveals 'large programs' at banks are kicking LPL tires

Though the rumor published by StreetInsider was quashed by prominent analyst Bill Katz at CitiGroup, who researches both companies, the shares didn't seem to mind and remained at a 4% premium from where they left off at Wednesday's market close.

Yet the prospect of a Schwab-LPL merger is almost absurdly tempting, observers say. Each company commands the lion's share of market share in their respective advisory channels. Schwab owns the RIA business with about $1.2 trillion of assets from 7,000 RIA firms and LPL owns the independent rep market with $485 billion from its 14,000 firms. See: Why exactly a $2.2 billion RIA hybrid abruptly dumped LPL for Securities America -- and Schwab, Fidelity and TD Ameritrade.

In addition to the surface gleam, the compatibility factor has depth in the details.

LPL's deal with San Francisco-based FutureAdvisor, by contrast, may limit how much repurposing it can do with such technology. See: LPL unveils BlackRock's FutureAdvisor as its robo partner -- albeit with LPL model portfolios

Anathema ... but possible

"This reminds me of all the times we looked at buying a broker-dealer when I was at Schwab," he says. "The head of advisory would always say: It's like Disney selling porn."

Nomura analyst Steve Chubak counters that by telling Barron's that “Trump tailwinds could render a deal more viable,” alluding to the possibility that President-elect Donald Trump’s could undo DOL’s new fiduciary rule. He adds in a research note: "There is growing expectation that the DOL rule could be softened under the new GOP (see recent comments from Hensarling), which would remove one of the hurdles to an LPLA takeout."

Welsh allows that times have changed -- hence the jarring aspect of that metaphor -- from 2000 when LPL brokers were more likely to be pushing product than they are today. See: How LPL's CFO answered the Cetera question at Morgan Stanley Financial's conference

And he can see the obvious synergies.

"It would give Schwab distribution and LPL a brand," Welsh says. "But you shouldn't expect to see LPL brokers in Schwab branches. It's anathema to Chuck's ethos and what he's been railing against."

But another source speaking on the condition of anonymity says Schwab already struggles enough with channel conflict between RIAs and its branches. Tossing 14,000 additional LPL advisors into that mêlée would assure  more discord than Schwab CEO Walter Bettinger has the stomach for.