If the treatment works, Paldi believes, an RNA intervention could sail past regulators.
In the past, regulators and those in the industry corrected problems by studying what led to past crashes.
The deal was one that raised eyebrows from the start on whether it would get past regulators.
In the past, regulators have been worried about the systemic risk of brokers' loans to hedge funds.
Pedro Oliveira, an analyst at BPI, also said Mr. Slim's support increased the odds of the deal getting past regulators.
A bmi-BA pairing could not now get past regulators, as it would account for over half the total slots at Heathrow.
In the past, regulators also called for improvements in trading software and hardware, but those conversations and new rules have not prevented new problems.
But to get that past regulators, BA would have to give up hundreds of slots at Heathrow, which Mr Eddington is reluctant to do.
Instead, Mr. Karmazin, who increased subscribers to 8.9 million from some 600,000, become convinced that he could get a Sirius-XM deal past regulators and that unlike terrestrial radio, with its legacy costs, he could make it a fast-growing company.
Some big takeovers lately have had similar profiles — the purchase of the insurer Aetna by the drugstore chain CVS, and Amazon's purchase of Whole Foods — and they typically make it past regulators.
In the past regulators have tended to leave it to the market to judge the health of banks, not least because they themselves did not feel up to it.
