プレミアム価値のプレビュー
JSDA 計算式チートシート
この印刷用チートシートには、試験で使う主要な計算式、時短用のコツ、ひっかけや実務的なバリエーションがまとまっています。プレミアム会員は完全版を利用できます。
無料プレビュー：最初の10個の計算式
完全版を解放する前に、レイアウトや解説スタイルを確認できます。
Price return
(Ending Price − Beginning Price) ÷ Beginning Price × 100%
Use this to estimate the pure capital gain or loss before dividends or coupons.
Total return
(Price Gain + Income) ÷ Initial Cost × 100%
Include dividends, coupons, or other income when comparing investments.
Dividend yield
Annual Dividend ÷ Share Price × 100%
Higher yield can look attractive, but always assess sustainability and risk.
P/E ratio
Share Price ÷ Earnings Per Share
Helpful for relative valuation comparisons across companies or sectors.
Current bond yield
Annual Coupon ÷ Market Price × 100%
Quick for test questions, but different from full yield to maturity.
Simple interest
Principal × Rate × Time
One of the easiest marks if you keep the time unit consistent.
Compound growth
Principal × (1 + r)^n
Use for repeated growth over multiple periods.
Profit or loss
Sale Proceeds − Purchase Cost − Fees
Always include fees or commissions in the final result.
Coupon income
Face Value × Coupon Rate
Useful when comparing bond cash flow with purchase price.
Break-even price
Total Cost ÷ Units
Good for identifying when a trade moves from loss to profit.
プレミアム解放
さらに15個の応用計算式、覚え方、試験の落とし穴
Loan-to-value
Loan Amount ÷ Asset Value × 100%
A higher ratio usually means more credit risk.
Capital adequacy ratio
Capital ÷ Risk-Weighted Assets × 100%
Remember it measures strength against risk exposure.
Net asset value per unit
(Assets − Liabilities) ÷ Units Outstanding
A common investment trust concept.
Sharpe-style comparison
(Return − Risk-Free Rate) ÷ Volatility
Focus on the idea of return per unit of risk.
Foreign exchange conversion
Base Amount × Exchange Rate
Read carefully whether the quote is direct or indirect.
After-tax income
Income × (1 − Tax Rate)
Questions often hide the tax effect in the wording.
Cost averaging
Total Invested ÷ Total Units Bought
Helps compare average acquisition price across time.
Margin maintenance
Equity ÷ Market Value × 100%
Watch for maintenance threshold triggers.
Portfolio weight
Position Value ÷ Portfolio Value × 100%
Useful in diversification and risk concentration questions.
Expected portfolio return
Σ(Weight × Asset Return)
Use the weighted average, not a simple average.
Inflation-adjusted return
Approx. Nominal Return − Inflation Rate
This gives a quick real-return estimate.
Accrued interest
Coupon × Days Accrued ÷ Days in Period
Often appears in bond settlement questions.
Redemption gain/loss
Redemption Value − Purchase Price
Add coupon effects if the question asks for total gain.
Expense ratio impact
Gross Return − Fund Costs
A small annual cost can materially reduce long-run return.
Target score tracking
Correct Answers Needed ÷ Total Questions × 100%
Useful for estimating the pass threshold during mocks.
試験直前のコツ
- 数字を入れる前に、まず式の形を書き出しましょう。
- 答えが割合なのか実数なのかを必ず確認しましょう。
- 手数料、配当、期間の記載が入っていないか注意しましょう。
- 試験前に自動で出てくるくらいまで反復すると強いです。
- フラッシュカードや模擬試験と組み合わせると定着率が高まります。