mathjak107 said:
INTERESTING VIEW....they go upto 2000...after the lows of the early 2,000's stocks and bonds once again followed each other as rates dropped and stocks rose until the feds recent tightning
http://nbr.infometrics.co.nz/bonds-in-growth-portfolios--no-diversification-value_442.html
Interesting article. I wonder were he got the data. Using Ibbotson's data for Tbills, LT Treasuries, and LT Corps, I get correlations of -0.0097 [tbill], 0.3036 [LT Treasuries], and 0.4019 [LT Corps]for correlations with the CRSP 1-10 for 1990-1999.
Also interesting is that the correlations turned around after 1999, to be -0.1953 [Tbills], -0.2614 [LT Treasuries], and -0.0845 [LT Corps] for the 5 years 2000-2004.
His return data must be off, b/c the CRSP 1-10 returned 8.27% in the 1960's and 6.19% in the 1970's. Also, stocks and bonds returned similarly in the 1970's [b/w 6-7%], and stock beat bonds in the 1980's.
Data issues aside, LT bonds definitely had a higher correlations with stocks in the 1990's than in the following 5 years. I think the conclusion should be something along the lines of "we can never know in advance whether or not stocks and bonds will be + or - correlated."
Finally if bond and stock returns are positively correlated, or at least not ever significantly negatively correlated, why would you invest in an asset class that affords lower long term returns?
A couple of reasons:
1. I may care about "risk adjusted" returns. If so, then the portfolio with the highest risk-adjusted return [like sharpe ratio] may be a combo of stocks and bonds, not one or the other.
2. If I hold a bond [or bond fund] for it's duration, I know what my return will be. If I use TIPS, I know what my real return will be in advance.
3. A portolio of stocks
and bonds may provide a higher withdrawal rate than stocks alone. [see Jaye Jarrett's
The Fixed Income Portion of a Retirement Withdrawal Strategy - I couldn't find his website anymore
]
- Alec