Gold options priced a wider range into the weekend

What was repriced

Investing.com and YCharts both record the Cboe Gold ETF Volatility Index at 26.15 for the 30 October close, up from 22.73 on 29 October. That was an increase of 3.42 volatility points, or about 15.0% of the previous reading. The FRED distribution of Cboe data that I checked still ended on 29 October. Its Friday update time describes publication of Thursday’s reading. The Friday figure here comes from the two named market histories.

Cboe derives GVZ from quoted options on SPDR Gold Shares. It estimates the variability priced into that ETF over a 30-day horizon, expressed on an annualized scale. A contract on COMEX futures and a Dubai dealer’s bullion offer are separate instruments. Applying the index to either requires a proxy assumption.

Source notes: [1] Investing.com · GVZ historical daily observations · [2] YCharts · CBOE Gold Volatility Index level history · [3] Federal Reserve Bank of St. Louis · Cboe GVZCLS · [4] Cboe · Gold ETF Volatility Index description

Translate volatility points into a horizon

For a rough 30-calendar-day scale, multiply annualized volatility by the square root of 30 divided by 365. Thursday’s 22.73% becomes approximately 6.5%. Friday’s 26.15% becomes approximately 7.5%. On a hypothetical reference value of 100, the second calculation gives about 7.5 units of movement on a one-standard-deviation scale. It does not predict a finish at 107.5 or 92.5.

That shortcut assumes variance accrues evenly over time. An event concentrated in one week or a sudden jump in the underlying can make it a poor description of any single day. Even a correct scale does not establish a fixed probability of remaining inside the band, since the distribution of future returns is unknown.

A spot bounce cannot close the case

At 00:27 UTC on Monday, 2 November, Dow Jones Newswires reported spot gold up 0.6% at $3,898.35 per ounce. That early Asian quotation gives a price and a direction. It cannot validate or refute the Friday options range. The range concerns thirty days of variability in an ETF. One spot observation covers another instrument at another time.

Two quite different paths can finish at the same price. One might stay within a tight band throughout the month. The other might swing sharply in both directions before returning to its starting point. The second can produce much higher measured volatility despite the identical endpoint.

Source notes: [5] Dow Jones Newswires via The Wall Street Journal · Asian gold market update

How I would judge the price of uncertainty

To assess what the market priced on Friday, fix the starting index observation first. Then collect daily returns on the same ETF across the forward window, recording the calendar convention used to annualize realized variance. Compare squared volatility measures on consistent units. A persistent gap across many windows would deserve investigation into the price of bearing risk. A single gap could be sampling variation. Neither the index level nor the early Monday bounce identifies a profitable options trade after premiums and costs.