Jan

14

The attached charts the ratio SPY/TLT 2002-present [The S&P ETF vs the US Treasury ETF]. The current ratio of about 1.06 is near the bottom of the post 08-09 crisis range, but still far from the bottom reached in March 2009.

Victor Niederhoffer writes: 

This illustrates the wisdom of the proverb "there is always a web between markets but the web is always changing". Conversely nothing exemplifies this proverb better than the shifting relation between fixed income and stocks.

Alston Mabry adds:

Just as an exploratory reminder to myself, attached is a chart showing the variations in 60-day correlations between two 1000-day series (of % changes) generated randomly but with an overall correlation of -0.3.  In other words the true correlation is -0.3 but we pretend we don't know that and measure the 60-day sampled correlation.

Ken Drees adds: 

Zussman's chart makes one think about potential energy–the buildup of potential change as one sector grows larger than the other.

Alston Mabry adds: 

And again, just to see what it looks like, here's the rolling 20-period correlation for the weekly % changes of Dr Z's SPY and TLT.

Finally, one last chart, combining the previous two ideas: the rolling 20-week correlation of SPY and TLT, graphed with the rolling 20-period correlation of two random series with the same overall correlation as SPY-TLT (-0.41).


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