Yes, you should. Based on Research, 2 out of 3 times investing Lump Sum immediately is better than Dollar Cost Averaging (with 2% incremental returns over a 12-month period)
Here is what you need to know about Dollar Cost Averaging and Lump Sum Investing:
- Vanguard research proved that it doesn’t pay to wait and try to dollar cost average
- However, you may try it to avoid any regrets in a downmarket
- Even professional investors don’t know if we are still in a bear market
- Only ~30% of time will this strategy work but on average you pay a price for it since cash is a drag on portfolio performance
- If you try to Dollar Cost Average: (i) be disciplined and (ii) don’t do over more than 12-months
Vanguard has compared outcomes in 3 countries and in each case immediate lump sum investing comes out better (68% to 70% of cases) than systematic (i.e. dollar cost averaging) with a significant 12-month portfolio outperformance:

Your Asset Allocation doesn't matter - in each scenario it's better to deploy a lump sum

But should you proceed with Dollar Cost Averaging down in Coronavirus Bear Market?
As highlighted above there is over 60% chance this won’t increase your returns (are in yellow). But there is a slim chance that it will especially in a Bear Market (the area NOT in yellow)

The case for Dollar Cost Averaging down? Regret Aversion

Are we in a Bear Market though?
But on average you will pay a price for it
Historical Analysis proves that on average you will pay the price for mental comfort of Dollar Cost Averaging. However if you do decide to do it, Vanguard has two important messages from their analysis:
- Stick to the discipline and invest on a regular monthly basis over 12 months
- Don’t spread it out over more than 12 months (you can’t beat the lump sum investment over a longer time period)

Conclusion: Research proves it pays to deploy a lump sum and put money to work straight away

Source: Vanguard
Thanks for subscribing!
Interesting to see that even at 3k S&P level most are still skeptical
Hi Jeremy,
Indeed – There will be some client pressure and FOMO I expect if a second leg down doesn’t materialize
Best,
Raph
I don’t think it is that simple, Happiness isn’t just about rate of return. If dollar cost averaging eases someone’s anxiety then the generally very small penalty may be well worth it.
This tackled the problem from an academic perspective (and it’s also Vanguard’s research so they will have incentive for you to invest asap). That said, my personal preference is to have a buffer to profit from major sell-offs, conceptually described here:
https://bankeronwheels.com/covid-19-how-to-start-investing-for-long-term-returns-implementation/