BA II Plus technique for CFA Level I quantitative methods

The CFA Level I quantitative methods section is a machine for testing whether you can set up problems faster than you can solve them. The BA II Plus is allowed precisely because it rewards preparation: every TVM, NPV/IRR, statistics and conversion question becomes ten keystrokes of routine — if your settings and signs are disciplined.

Pacing: structure first, compute last

Budget roughly 90 seconds per question. Spend the first 20 writing down which registers you know and which you need — N, I/Y, PV, PMT, FV or the flow list — then compute once. Re-reading the vignette mid-keystroke is how scores die. Every worked number below is engine-verified, so practicing them on FinScope trains exactly the muscle the exam measures.

TVM: the sign discipline

1. Before every problem: 2ND CLR TVM — stale registers are the #1 silent killer.
2. Decide the direction of money: out of pocket is minus, into pocket is plus.
3. Invest 100 for 5 years at 10%: PV = −100, I/Y = 10, N = 5, PMT = 0, CPT FV → 161.051.
4. Loan of 100,000 at 1% monthly for 360 months: PV = 100,000, CPT PMT → 1,028.61.
5. Check the answer's sign before moving on — an FV or PMT with the wrong sign means a setup error, not a rounding error.

NPV and IRR keystrokes

Enter the CF worksheet: CF0 = −1000, then C01 = 300, F01 = 1, C02 = 500, F01 = 1, C03 = 500, C04 = 200. Then NPV → I = 10 → CPT gives 198.2105, and the IRR menu computes 19.0862%. Two habits: check that F01 (frequency) is 1 unless flows truly repeat, and glance at the sign changes — the flow −1000, 500, −300, 400 has three, which means IRR is not trustworthy on it.

The statistics worksheet for regression

Set the calc mode to LIN (2ND + STAT), enter X data in X01… and Y data in Y01…, then read a, b, r from the 2-var menu. With points (1,2), (2,5), (3,10) the verified outputs are a = −2.3333, b = 4 and r = 0.9897 — and forecasting is instant: Y′ at X = 4 is 13.6667, and X′ at Y = 13.6667 is exactly 4. The forecast keys (X′ and Y′) are the ones candidates most often forget exist.

ICONV and the frequency traps

• 2ND ICONV: NOM is the quoted annual rate, EFF the true annual rate, C/Y the compounding count.
• 12% nominal quarterly → EFF 12.5509%; monthly → 12.6825%. Write the frequency beside every rate you quote.
• For bond questions, C/Y is 2 for semi-annual coupons — setting it to 1 silently re-prices the bond.
• P/Y and C/Y are separate: a monthly-payment loan with quarterly-compounded interest needs both set deliberately.

Gold tips

• Watch the BGN indicator at the top of the screen: on = annuity due, off = ordinary. Reset to END after lease questions.
• 2ND FORMAT sets decimals — use at least 4 for rate problems; 2 decimals can flip a multiple-choice answer.
• Amortization questions live in 2ND AMRT with P1/P2 — read the window labels before reading the numbers.
• Practice on a web calculator like FinScope between sessions: identical engine results, faster feedback loop.
• Bring a backup BA II Plus (or the same model) — the proctor will not lend you one.