The average interest rate for standard 30-year fixed-rate mortgages fell to 6.01% during the week ending April 25, from 6.04% the previous week.

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By comparison, the spread between 10-year Treasurys and a standard 30-year fixed-rate mortgage is just 1.93 percentage points, near historical averages, according to mortgage-data provider HSH Associates.

WSJ: Credit Cards Are Exception to Lower Consumer Rates

Notice 2012-72 contains the standard mileage rates, the amount a taxpayer must use in calculating reductions to basis for depreciation taken under the business standard mileage rate, and the maximum standard automobile cost that a taxpayer may use in computing the allowance under a fixed and variable rate plan.

FORBES: 2013 IRS Mileage Rate Increases To 56.5 Cents Per Mile

Lenders' standard variable rate (SVR) deals are tending to be more attractive than new fixed-rate deals for owners, with interest rates having plunged in recent months.

BBC: Mortgage lending 'rises slightly'

The same is true of the assumption that the mortgage repayment will rise (it could be a longer-term fixed rate for example), or by how much - we have used the Standard Variable Rate (SVR), but the borrower may be using a mortgage which charges a different interest margin.

BBC: NEWS

All were former Abbey customers, who were put on standard variable rate (SVR) mortgages after coming off fixed-rate deals.

BBC: abbey

The standard mileage rate for business is based on an annual study of the fixed and variable costs of operating an automobile.

FORBES: 2013 IRS Mileage Rate Increases To 56.5 Cents Per Mile

Unlike days of old, Washington doesn't need piles of gold, nor does the government need to promise to exchange gold at a fixed rate for dollars, as it did under the traditional gold standard.

FORBES: Hamilton Got It Right--Why Can't We