The way to get better yields is to buy mortgage-backed bonds, which are shares in mortgage pools.

FORBES: Magazine Article

The manufacture of these mortgages appeared to be driven by a limitless demand for securitized debt, with investors throughout the world buying interests in various mortgage pools.

FORBES: Weaning Ourselves from Economic Steroids - Excess Debt

Modifying the terms of the underlying mortgages for some of these securities will mean payments even lower than the amounts investors had counted on when they bought the mortgage pools in the first place.

FORBES: Bush's Bad Mortgage Medicine

That would be awfully convenient for the largest banks, which also happen to own the largest servicers, since during the housing bubble they tended to sell first liens into mortgage-backed securities pools and keep the higher-yielding seconds for themselves.

FORBES: Tobacco II? Big Banks Would Benefit From Mortgage Settlement

Bernanke keeps promising to do this via purchasing mortgage-backed securities and pools of credit card debt and car loans.

FORBES: Washington: Still Abusing the Economy...

Since nobody seems to know what is inside all those collateralized debt obligations and their kindred collateralized mortgage obligations--mega-investment pools that bundle subprime loans--2007 audited results should help bolster confidence when they're released sometime in the new year.

FORBES: Buy Some Insurance

Though considerably shy of the of 20 plus trillion dollar market for credit default swaps (derivatives also capable of mass destruction), pools of single-family homes wrapped in mortgage-backed securities blankets dwarf all other tradeable instruments.

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Alex Pollock of the American Enterprise Institute thinks that securitisers should be required to guarantee the quality of their loan pools, as are America's government-sponsored mortgage giants, Fannie Mae and Freddie Mac.

ECONOMIST: Securitisation