By Shane Oliver There's more information on the link, however the below is pertinent on timing But why not try and time short-term market moves? The temptation to do this is immense. With the benefit of hindsight many swings in markets like the tech boom and bust and the GFC look inevitable and hence forecastable and so it’s natural to think “why not give it a go?” by switching between say cash and shares within your super to anticipate market moves. Fair enough if you have a process and put the effort in. But without a tried and tested market timing process, trying to time the market is difficult. A good way to demonstrate this is with a comparison of returns if an investor is fully invested in shares versus missing out on the best (or worst) days. The next chart shows that if you were fully invested in Australian shares from January 1995, you would have returned 9.7% pa (with dividends but not allowing for franking credits, tax and fees). Source: Bloomberg, AMP Capital If by trying to time the market you avoided the 10 worst days (yellow bars), you would have boosted your return to 12.4% pa. And if you avoided the 40 worst days, it would have been boosted to 17.3% pa! But this is very hard, and many investors only get out after the bad returns have occurred, just in time to miss some of the best days. For example, if by trying to time the market you miss the 10 best days (blue bars), the return falls to 7.6% pa. If you miss the 40 best days, it drops to just 3.6% pa. The following chart shows the difficulties of short-term timing in another way. It shows the cumulative return of two portfolios. A fixed balanced mix of 70 per cent Australian equities, 25 per cent bonds and five per cent cash; A “switching portfolio” which starts off with the above but moves 100 per cent into cash after any negative calendar year in the balanced portfolio and doesn’t move back until after the balanced portfolio has a calendar year of positive returns. We have assumed a two-month lag. Source: Global Financial Data, AMP Capital Over the long run the switching portfolio produces an average return of 8.8% pa versus 10.2% pa for the balanced mix. From a $100 investment in 1928 the switching portfolio would have grown to $218,040 compared to $705,497 for the constant mix.