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EWMA volatility · Julia

function ewma_vol(close::Vector{Float64})
    r = close[2:end] ./ close[1:end-1] .- 1
    v = r[1]^2
    for x in r[2:end]; v = 0.94v + 0.06x^2; end
    return sqrt(v * 252) * 100
end

Correct · 12.451%

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Portfolio & risk9

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Your signal only sees the past, each decision earns the next day’s move minus costs, and the end of the history is held out. Read the out-of-sample column before believing anything.

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The markets tracks

From market fundamentals to stochastic calculus and electronic trading.

5 lessons

Market Foundations

From no finance background to reading a quote, computing P&L and measuring risk. Start here.

5 lessons

Maths Refresher for Markets

The five pieces of maths every other track assumes, each through a market example: compounding, derivatives, matrices, probability, estimation.

6 lessons

Derivatives & Volatility

Option pricing, the Greeks as a working language, and the gap between implied and realised vol.

6 lessons

Derivatives desk - after Hull

Forwards, swaps, trees, Greeks, volatility models, VaR, short rates and credit - the core of Options, Futures, and Other Derivatives, made interactive.

6 lessons

Portfolio & Risk

Combining positions: covariance, diversification, beta hedging and why optimisers lie.

5 lessons

Microstructure & Execution

How orders actually meet: the book, slippage, execution algorithms and adverse selection.

6 lessons

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5 lessons

Crypto & DeFi Markets

Perpetuals, funding, liquidations, AMMs, impermanent loss and on-chain costs. 24/7 markets with their own physics.

10 lessons

Senior quant - stochastic calculus, time series, electronic trading

What a desk expects after the first year: Itô and measure changes, cointegration and Kalman filters, factor risk, vol surfaces, curve building, optimal execution and market making. Puzzles at difficulty 4–5.

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