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April 18, 2017 Bond guru Jeffrey Gundlach of Double Line Capital noted in his 2017 forecast that the copper-to-gold ratio is a "fantastic" coincident indicator of interest rates.I tested his thesis by constructing a 2-year regression model of the U. 10-year Treasury yield given daily Comex copper and gold prices. Figure 1 compares the model output to the 10-year Treasury yield.The goodness-of-fit, or “R-squared,” is a respectable 0.78 – the closer to 1.0 the better. 10-year Treasury yield model based on Comex copper & gold prices Interestingly, the correlation holds up for longer periods.The correlation of the 10-year yield over this two-year period is a very tight -0.88. Extending the model to a three-year period results in a correlation of -0.84 and a slightly greater model error of 17.6 bps and lower R-squared of 0.70.
Last week’s GCR briefly touched 500 pounds per ounce, a level not seen since early-November (i.e.As such, it is a measure of related to perceived image sharpness in a print or display.SQF and Acutance measure perceived sharpness as a function of print or display height and viewing distance using formulas that include MTF, assumptions about viewing distance (often proportional to the square root of the print height, but other options are available) and the human visual system (the human eye’s Contrast Sensitivity Function.This document describes methods for validating the slanted-edge method for calculating image sharpness (expressed as Modulation Transfer Function, MTF, which is synonymous in practice with Spatial Frequency Response, SFR).MTF is a measurement of image contrast as a function of spatial frequency.