The market just hit a fresh all time high today which means another major default must be just around the horizon. Sure enough, the FT reported moments ago that a Puerto Rico default "appears increasingly likely" and is why creditors are meeting with lawyers and bankruptcy specialists (supposedly Jone Day, which means where Corinne Ball is Ken Buckfire, fresh from its recent league table success with the Detroit bankruptcy, can't be far behind) on Thursday in New York. The FT cited a restructuring advisor, supposedly desperate to sign the engagement letter with creditors and to force the bankruptcy, who said that "the numbers are untenable" and "to issue new debt the yield would have to rise and where they can’t raise new money they will have to stop paying."

The untenability of PR's cash flows results from a "debt service burden that requires paying between $3.4bn and $3.8bn each year for the next four years. As doubts grow about the ability of the commonwealth to service that debt, the cost of doing so will inevitably rise."

For Puerto Rico bonds, such an outcome would not be exactly a surprise, most recently trading at 61:

The rest of the story is largely known:

If Puerto Rico is forced to take that step, the effects will ripple through the entire $4tn municipal bond market. Because the debt is generally triple tax free, in a world of zero interest rates demand is high and it is distributed widely, including in funds that imply they have no exposure to Puerto Rico. But yields have gone up nevertheless – and prices down – suggesting the markets are increasingly nervous about prospects for repayment. Estimates on how much of that debt is insured range from 25 per cent to 50 per cent of total issuance. “Everyone thinks they can get out in time,” the restructuring adviser said. Puerto Rico cannot really raise taxes much more, since the debt per capita is more than $14,000, while income per capita is almost $17,000, a ratio – at 83 per cent – that makes California, Illinois or New York – each at 6 per cent – models of prudence. Meanwhile, at 14 per cent, the unemployment rate is twice the national average.

What would make a Puerto Rico default more interesting is that as in the case of GM, political infighting would promptly take precedence over superpriority and waterfall payments. According to the FT, "any radical step, which the local government denies considering, would involve significant legal wrangling. Congress could step in and create an insolvency regime, lawyers say, since it has comprehensive jurisdiction, but that too would give rise to partisan fighting. The Democrats would say that pension claims have priority while the Republicans would uphold the priority of payments to bondholders, citing the constitutional sanctity of contracts."

Of course, since in the US a bond contract now is only worth the number of offsetting votes it would cost, nobody really knows what will happen. And so, we sit back and watch, as yet another muni quake appears set to hit the US, in the process obviously sending the S&P to higher, record highs.

In the meantime, keep an eye on bond insurers AGO and MBI which have taken on water in today's session precisely due to concerns over what a Puerto Rico default would do to their equity.