Price creates the slope.
A higher spot price raises the call value, with other inputs fixed.
Understand investing, trading and quantitative finance. Learn the ideas, work through the models and put your knowledge into practice.


A policy headline arrives. Start with what was already in the price, then follow what the new information changes. Economics, mathematics and judgement meet in the same question.
An announcement alone does not determine the outcome. Expectations and risk premia matter.
Work through the bond exampleSuppose a central bank signals tighter policy. Ask what the market had already expected.
A revised path for future rates can change required yields. Credit and liquidity risk also matter.
For fixed promised cash flows, a higher required yield means a lower present value, and vice versa.
Compare the maturity, coupon and risk exposure. Explain which assumptions your answer depends on.
The question to carry forwardWhat would change your conclusion?
Our teaching philosophyRead the Black–Scholes surface as an argument about a European call. Follow the effect of spot and volatility, then ask which real-world risks this model leaves outside the frame.
A higher spot price raises the call value, with other inputs fixed.
In this model, higher volatility lifts the European call surface.
Near the strike, the option’s response to price changes becomes especially visible.
Fixed assumptions: one year to expiry · 3% continuously compounded risk-free rate · no dividends. Constant volatility for each valuation. A model illustration, not observed prices or a forecast. The moving highlight changes no calculated value.
Start with a question. Follow the evidence, inspect the calculation and decide whether the conclusion holds.
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A sensitivity table is useful only when its numbers connect to an economically coherent business case.

Identify the curve, its conventions and the source of a move before interpreting the shape.

Follow the additional decisions between an indicator and an investable model portfolio.
A look at the courses we are preparing. Enrolment opens when each course is ready.
Change the assumptions in this Monte Carlo experiment. Compare the range of outcomes, then ask what the simulation cannot tell you.
A market model describes possibilities. Change the assumptions and examine how uncertainty evolves over time.
The shaded band contains the middle 90% of simulated index levels at each point in time. Individual paths can move outside it.
Research fellowship, individual guidance and learning for teams. Explore the approach that fits the work you want to do.
Explore programmesOne idea. A worked example. A question to make it yours.
Suppose you will receive ₹110 in one year. At a required return of 10%, its present value is ₹100. Change the required return and the value changes.
Present value = ₹110 ÷ (1 + required return)
One future payment · one year · no other cash flows
A short example from our teaching approach. Take it at your own pace.