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Level 16 · ◆◆◆◆ · ~13 min

Matrices & Portfolio Variance

Matrices & Portfolio Variance

"Risk needs a grid, not a list. The covariance matrix — and one tidy 'sandwich' formula — give a whole portfolio's risk."

matrixmatrix-vector productcovariance matrixquadratic formeigenvalues
🚀 You're jumping ahead. This builds on Vectors & the Portfolio — but play it now and you'll still earn full XP. If it feels steep, those make a gentler on-ramp.

A short lesson, then a quiz. ❤️×3 — a wrong answer costs a heart; finish with at least one left and the level is yours. Lose all three and you'll have to try again. Replay any time — XP and cleared levels are never lost.