【安い時に多く、高い時は少なく】相場に合わせて自動で積立額を変える「ダイナミック積立」の仕組みを解説／積立投資の新潮流／感情を挟まないほったらかし投資

Summary

The video introduces Webull Securities’ Dynamic Accumulation plan, which automatically raises or lowers the amount invested based on a stock or index’s price relative to a moving average. The aim is to invest more when prices are relatively low and less when they are relatively high, without requiring investors to make decisions in real time.

The discussion also covers Moneybull, a service that automatically converts yen into US dollars and sweeps the dollars into an external money market fund (MMF).

Dynamic Accumulation: How It Works

• Investors set a base contribution amount. The system adjusts the investment amount, not just the number of shares:
  • It can invest up to 200% of the base amount when prices are relatively low.
  • It can reduce the investment to 50% when prices are relatively high.
  • For example, a ¥10,000 base contribution could become ¥20,000 or ¥5,000.
• Adjustments are based on the price’s relationship to a moving average, rather than an assessment of a company’s fundamental value:
  • The speakers describe investing up to 200% when the price is more than 15% below the selected moving average.
  • They describe investing 50% when the price is more than 20% above it.
  • Investors can choose a 120-, 250-, or 300-day moving average. The speakers suggest that longer periods may suit longer-term investors.
• Investors can choose a contribution schedule of weekly, every two weeks, or monthly, and select a purchase day.
• The benchmark can be an individual stock or an index such as the S&P 500 or Nasdaq.
• According to the speakers, the plan is available for about 3,000 US-listed stocks and ETFs. Fractional-share trading is supported, and the broader service allows small recurring US-stock investments. One speaker says investments can start from $1; the app demonstration gives a Dynamic Accumulation minimum of $2 and shows a $10 example varying between $5 and $20.
• The speakers say the plan was initially designed for investments outside NISA, as a taxable-account option for investors who have already used or want to supplement NISA.
• Contributions can be paused, changed, or canceled in the app. Purchases cannot exceed the cash available in the securities account, so investors are advised to keep a cash buffer if they want the plan to invest more during a downturn.

Strategy, Potential Fit, and Risks

• The speakers describe ordinary dollar-cost averaging as a way to avoid investing a lump sum on an especially expensive day: a fixed contribution buys more shares when prices are lower and fewer when prices are higher.
• Dynamic Accumulation adds a rules-based adjustment to the contribution amount. The speakers say automation may help investors avoid the common emotional tendency to feel fearful when prices fall and confident when they rise.
• They say the approach may work better in a market that fluctuates but trends upward over the medium to long term than in a market moving steadily in only one direction. A persistent rise or fall could limit the strategy’s intended benefit.
• Broad-market ETFs, such as those tracking the S&P 500, are discussed as possible candidates. The speakers caution that leveraged stocks and ETFs, which can have large short-term swings, may be unsuitable for this type of plan.
• Regular investing is not presented as a way to predict market direction or guarantee better returns. No performance results or backtest figures are provided.

Fees and Operating Details

• Webull Securities representatives say purchases of US stocks through the service carry no commission. They compare this with fees of about 0.495% at some Japanese online brokers and roughly US$22 at some other brokers. These are the speakers’ comparisons.
• Contribution amounts vary with market conditions, but automatic purchases will not exceed the funds deposited in the securities account.
• The service is offered through the app, and the speakers say the US market is available for 24-hour trading on their platform.

Moneybull and Currency Diversification

• Moneybull is presented as a more cash-management-oriented complement to Dynamic Accumulation.
• Users set an amount to save; the service automatically converts yen into US dollars, then sweeps the dollars into an external MMF.
• The speakers cite an annual return of about 3.16%. This is a rate quoted in the discussion, not a guaranteed return.
• They say the MMF investment begins earning from the next business day, and that the system automatically handles redemption when dollars are needed to buy securities.
• The interviewees argue that holding assets in currencies other than yen can diversify currency exposure. They cite an estimate that 60–70% of global financial assets are denominated in US dollars and note that judging a currency’s fair value is difficult. They also caution that a weaker yen reduces the yen value of foreign-currency assets when converted back.
• The discussion notes that dollar purchases can be spread over time rather than requiring a single currency-conversion decision. It also mentions that the company was seeking approval for the underlying money-management system.

Disclosures

• The video focuses on Webull Securities products. The provided metadata identifies it as sponsored by Webull Securities.
• No explicit “not financial advice” disclaimer appears in the subtitles. The discussion does not provide a detailed account of all fees, FX costs, MMF risks, or the variability of the cited return.

Presenters and Sources

• Aya Shibata — host
• Hideki Mitsuzuka — President, Webull Securities
• Shogo Suetsugu — Head of Global Markets, Webull Securities
• Source/channel: PIVOT Official Channel. Product information and claims are presented by Webull Securities representatives.