How can I review CFA calculator work if the BA II Plus does not show a full step history?

Build a short written audit trail instead of relying on calculator history. You do not need to write every keystroke. You need to capture the rate format, formula structure, and final sign.

For a duration item, a strong audit line might be: duration = 4.9, dy = +0.0025, price change approx = -4.9 x 0.0025 = -1.225%.

That line lets you check the three most common failure points: whether basis points were converted correctly, whether the sign matches the economics, and whether the final answer is in percent rather than decimal form.