There are plenty of academic papers arguing against this method of investing. I went down the research rabbit hole reading these papers for you, and I’m convinced that the academic theories fall apart when they encounter real-life investors. I’ll make this brief. Value Averaging: Some academics have shown a “value averaging” approach will perform slightly better than steady-drip investing. Academic Paul S. Marshall called the value averaging method “simple” in a 2000 academic paper, before describing how it works:
"The investor sets a predetermined worth of the portfolio in each future time period, as a function of the size of the initial investment, the size of periodic investments and the yield expected. The investor then buys or sells sufficient 'shares' or units of the investment such that the predetermined portfolio worth is achieved at each revaluation point." Like he said, it's “simple.” In value investing, you basically set a “target value” to hit each quarter with your portfolio, then you buy or sell the proper amount of bitcoin each quarter, depending on the current price. In real life, most investors don’t have the time, discipline, or spare cash to do this over the long term (5+ years). Random investing: There’s also research published by Marshall and E.J. Baldwin in 2006 that shows steady-drip investing does about the same thing as “random” investing, but their definition of random investing is “deciding 50/50 each quarter whether to invest,” which is just not how investors work. Most investors decide to buy when they get excited about it, say by reading an inspiring article on bitcoin, or having a friend tell them about it. They’re not looking at the price of bitcoin once a quarter, then flipping a coin: “Heads I buy, tails I don’t.” It’s this truly random behavior that’s impossible to fit into any academic theory, because it’s random. This kind of real-world "invest when I'm inspired" approach ultimately comes down to luck, but luck is not a great long-term strategy for building wealth. Steady-drip investing is still the best option for most people, because it gets you out of the decision-making process. You make one decision: to set up a monthly automatic withdrawal. Set it and forget it. |