I agree with @MarkPerryman, but the answer not explaining anything. I used Monte Carlo simulations(Link) to explain.
- Initial amount: 75,000 USD
- No contribution or withdrawal
- Start year: 1987
- End year: 2017
- Simulation Period in Years: 5
- Rebalancing annually
Here are some results.
- US Large Cap 100%: Link
- Total US Bond Market 100%: Link
- 50%/50%: Link
Since you want a risk-averse strategy, let's see the worst case from each simulation. See Simulated Portfolio Balances (inflation adjusted)
charts from the links. 10th Percentile
lines basically represent the worst cases. 50%/50%
's 10th Percentile
result is highest in 5th year. But mean standard deviation is still higher than Total US Bond Market 100%
.
But since you are investing, you might want some good returns if possible, right? Now see the rest percentile lines from the graphs.
- While
US Large Cap 100%
's 90th Percentile
has the highest value, 10th Percentile
is the lowest. Since you want to be safe, this is might not your option.
Total US Bond Market 100%
is very safe in 10th Percentile
case scenario. But it has worst 90th Percentile
results too, missing good opportunities.
50%/50%
has very safe 10th Percentile
results too. While 90th Percentile
value is not the best, it is higher than Total US Bond Market 100%
.
I believe you got the idea. Generally(but not always), diversifying portfolios reduce overall risk. Investopia explained diversification well(Link). It takes some opportunities during good times too. Research yourself for the better options, but don't waste your time tweaking too little things.