You are dead right. I posted this recently on another thread, but goes just as well on this one:
It might be fun to try and time the market if you can afford to, but if you're relying on it for future retirement plans, then it's an extremely bad idea.
Good article on it here:
Timing the market
"If at the beginning of 1986 you had invested £1,000 in the FTSE 250 and left the investment alone for the next 35 years, it might have been worth £43,595 by January 2021 (bear in mind, of course, that past performance is no guarantee of future returns).
However, the outcome would have been very different if you had tried to time your entry in and out of the market.
During the same period, if you missed out on the FTSE250 index’s 30 best days the same investment might now be worth £10,627, or £32,968 less, not adjusted for the effect of charges or inflation.
Over the last 35 years your original £1,000 investment in the FTSE 250 could have made:
- 11.4% per year if you stayed invested the whole time
- 9.5% per year if you missed the 10 best days
- 8.1% per year if you missed the 20 best days
- 7% per year if you missed the 30 best days
The 1.9% difference to annual returns between being invested the whole time and missing the 10 best days doesn’t seem much. But the compounding effect builds up over time, as shown in the table below. If you had invested in the FTSE 250 it could have cost you more than £19,000 during that time."