mighty58, I think you are overcomplicating a very simple procedure...
mighty58 wrote: ↑Mon Jul 11, 2022 8:50 am
For one thing, how do you define "a recent high"? Do you just pick a point on the chart and call it "time zero"?
The "recent high" is just the last high on the chart. In the case of the S&P it's about 4820 in Jan 2022.
mighty58 wrote: ↑Mon Jul 11, 2022 8:50 am
Another thing: what are the timespans? Daily falls? Weekly? Monthly? If you wait long enough, and pick an appropriate point on a chart, you can probably backwards-engineer your 10%, 20% falls. Or, conversely, you may never get them.
The timespans are irrelevant. It's all about the levels. A 10% drop from 4820 is 4338. This was hit at the end of Jan. A 20% drop from 4820 is 3856. This was hit in May. A 30% drop from 4820 is 3374. This hasn't been hit yet (and probably won't be, since it's a rare event).
Every time there's a new high you just recalulate the levels and reset your pending orders to buy. Most of the time they won't get hit. But when the market finally corrects, like it's doing now, at least one of your orders should get filled.
mighty58 wrote: ↑Mon Jul 11, 2022 8:50 am
Which leads to the final point, what to do with your cash while waiting for these occurences? This strategy seems to imply sitting on large amounts of cash waiting for rare events to happen (30% fall only six times in the past 70 years). Is that really the best use of capital?
You're right... it isn't the best use of capital. Personally I invest a fixed sum regularly each month no matter what the market is doing. But I do tend to accumulate cash over time, and having a certain amount of cash in your portfolio isn't such a bad thing in my opinion. Some portfolios even call for it, e.g. the Permanent Portfolio requires 25% of cash at all times.
So this stratgey is for people with spare cash savings, or for those who have received a lump sum recently and don't want to invest it all at once. But yeah, I get your point. Immediate lump sum vs DCA vs wait for a correction. It's a personal choice I guess, and very hard to get exactly right. I don't think we should worry about it too much.