Options were a post by themselves, and so are leveraged ETFs.
UPRO is a 3X S&P 500 ETF, and VOO is Vanguard's S&P 500 ETF. Looking at morningstar data, here's the 2017 and 2018 performance for both ETFs:
VOO : +21.77% then -4.50%
UPRO: +71.37% then -25.15%
Although UPRO uses 3x daily leverage, for 2017 it's performance was a 3.3x greater gain, and in 2018 a 5.6x greater loss. When both ETfs swing through +0%, they have very different volatility, and that volatility has a big impact. Although I'm viewing assets as reverting to the mean, that's not true of leveraged ETFs: they trace a 3X path determined by their underlying index. That's why they can be 5.6x for a loss and 3.3x for a gain.
I ran an analysis by putting 2020 prices into a spreadsheet, and comparing multiples at various points in time. I should probably expand that beyond 2020, but that helped me learn about leveraged ETFs. I looked at how far the underlying index would move if it reverted to the mean (reverting back to it's Jan 2 price, and reversing YTD losses). I then multiplied that performance by the recent multiple shown in my spreadsheet to get an expected recovery for leveraged ETFs.
Roughly speaking, it was half or less of what you'd expect if you think leveraged ETFs revert to the mean. Plug in some dates and prices, and compare UPRO and VOO, and you'll see the multiples for weeks or months do not match the daily leverage of these ETFs (they are intended for day traders, who only buy and sell these ETFs during trading hours, and don't hold them overnight).
Since the performance for various leveraged ETFs over time was much closer than I naively expected, I modified my plan. I aimed for things like the S&P 500, or developed markets.... not the specialty ETFs that have far higher risk but similar returns (in my view). I should probably make another pass, looking at 2018 data and volatility of each index.
Many leveraged ETF have been negatively impacted by events of the past 4 weeks. For those speculating on the price of oil, several leveraged oil ETFs closed. To be clear, these ETFs lost -95% or so, and then handed back the remaining 5% to investors as cash. Meaning, you could only speculate on the drop in oil prices - not on profiting when they go back up! But it gets even better - the leveraged ETFs that short the price of oil can also go broke in the same situation!
https://www.bloomberg.com/news/articles/2020-04-22/triple-leveraged-oil-product-shutters-in-wake-of-historic-crashAnother few ETF couldn't afford leverage, and switched from 300% leverage to 200%. Which means their "3X daily" leverage became "2X daily" without necessarily notifying everyone directly. So it's possible to take losses of 3X the underlying index, and then recover with only 2X the gains.
https://www.bloomberg.com/news/articles/2020-03-23/ten-leveraged-direxion-funds-cut-exposure-amid-global-turmoilPersonally, I devised an approach to avoid total loss with margin loans - you sell when the losses are greater than expected, but before they reach crash levels. Accept the loss, sell and pay down the margin loan. For example, during my margin loan I planned what would happen if markets were going to lose -50% of their value. As stocks were down -20% to -33%, I planned to sell and pay down the margin loan. Because of some front loading, at -25% losses for the market I might have sold and paid off half my margin loan, and then completely sell and exit margin by -33%. I could even have gone through great depression (-90%) level drops provided I exit my margin based on the level of losses.
Normal markets have circuit breakers, but that doesn't apply to leveraged ETFs. I've seen a leveraged ETF fall -30% in days, suggesting I'd have to monitor it constantly. Personally, I don't want to be "on call" for my leveraged ETFs, so I have to accept they might effectively be a total loss. If I can implement some software triggers on Interactive Brokers, I will - but I'm doing something unusual, and I don't know if anyone has tried it.
Let's say I buy UPRO. If UPRO's price drops -20%, I actually want to begin selling UPRO shares, and sell them all before losses are -33%. So far, that's just standard stop-loss orders. When markets go back up, I want to buy UPRO again... but only if I've already sold. I need my PRO position to be sold between -20% and -33% losses, and purchased again as it recovers back from -20% to -33%. Since later purchases depend on earlier sells, it's probably tricky for an ordinary customer to specify it. I don't know where that will ultimately lead - hopefully I don't need to hire a high frequency trading firm to manage my leveraged ETFs! :)
Don't forget - leveraged ETFs can lose 5.6x or even drop -95% and then liquidate, leaving you holding cash. I'm using them as being cheaper than margin, and without the margin calls. I prefer leveraged ETFs over options, because I don't have an expiration date that causes -100% losses. But I may change all of this before I actually invest more than 1% of my portfolio in leveraged ETFs, so buyer beware.