Volatility Analytics: IV Skew, Term Structure & Put/Call Ratios

1. Implied vs. Realized Volatility

Implied Volatility (IV) is what options traders expect future volatility to be — it is priced into every option contract. Realized Volatility (RV, also called Historical Volatility or HV30) is what the market actually delivered, calculated from the last 30 daily price returns.

IV > RV — Volatility Premium

Options are expensive relative to what's happening. The market is paying extra for protection or upside. Premium sellers are in a favorable environment — theta decay is working for them. IV likely contracts toward RV unless an event materializes.

RV > IV — Volatility Discount

Options are cheap — the market underpriced actual movement. Buyers of vol were right; realized vol outpaced expectations. Often seen after a surprise move or macro shock catches the market flat-footed.

Key insight: A persistently wide IV–RV spread is unsustainable. Either IV comes down (vol contracts) or RV rises to meet it (vol expands). This spread is the core driver of options pricing cycles.

IV vs RV — Interactive Time Series

IV (Implied Volatility)

HV30 (Realized)

Vol Premium

Vol Discount

Calm bull market: IV consistently above RV — options carry a premium. Favorable for premium sellers.

Vol Premium / Discount (IV − HV30)

Premium (IV > RV)

Discount (RV > IV)

2. Volatility Term Structure

Term structure shows ATM implied volatility plotted across expiration dates. It answers: does the market price more fear near-term or long-term?

Contango (upward slope): Near-term IV < long-term IV — normal, calm market. Market expects more uncertainty further out.
Backwardation (inverted): Near-term IV > long-term IV — immediate fear elevated. Classic during macro events, FOMC, or sell-offs.
Event kink: One specific expiration has a local spike — a known catalyst (earnings, Fed meeting, OpEx) priced into that date only.

Trading use: In backwardation, near-term options are expensive relative to back-month — selling front-month and buying back-month (calendar spreads) can capture the elevated premium while the event resolves.

Term Structure — Interactive Chart

Today

Yesterday (faded)

X-axis: expiration dates. Y-axis: ATM IV %. The curve shape defines the volatility regime for each time horizon.

3. Volatility Skew

Skew shows how IV changes across strike prices for a fixed expiration. Different strikes carry different implied volatilities because the market prices asymmetric risk.

Put Skew (normal — SPX typical)

OTM puts carry higher IV than OTM calls. The market pays extra for downside protection. The curve slopes down left-to-right, steepest on the put side.

Call Skew (squeeze / momentum names)

OTM calls carry higher IV — traders aggressively buying upside. Seen in meme stocks, earnings runners, and short-squeeze candidates.

Volatility Smile: Both OTM puts AND calls are elevated relative to ATM. Signals binary event risk — market fears a big move in either direction.

IV Skew — Interactive Chart

Put side (OTM)

Call side (OTM)

IV curve

X-axis: moneyness (% from ATM spot). Y-axis: Implied Volatility %. Vertical dashed line = current spot price (ATM).

4. Put/Call Ratios

The Put/Call ratio divides total put activity by total call activity — either by volume (what traded today) or open interest (what's held overnight). It is a direct measure of directional sentiment in the options market.

P/C > 1.0: More put activity than calls — bearish sentiment or heavy hedging demand
P/C < 0.7: Call-heavy flow — bullish or speculative positioning
P/C > 1.5 (extreme): Contrarian buy signal — everyone is already hedged, downside is often priced in
P/C < 0.4 (extreme): Contrarian warning — excessive call buying, complacency risk

Volume vs OI P/C: Volume P/C is noisy but current — reflects today's flow. OI P/C is stickier — it shows accumulated positioning over days/weeks. Divergences between the two are informative.

Put/Call Ratio — Interactive Chart

P/C ratio by expiration. Above 1.0 line = put-heavy. Below = call-heavy.

Bottom: 30-day historical P/C ratio. Dashed zones mark extreme readings (>1.5 fear / <0.4 greed).

Volatility Analytics

IV > RV — Volatility Premium

RV > IV — Volatility Discount

Put Skew (normal — SPX typical)

Call Skew (squeeze / momentum names)

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