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Markets: Trading / Derivatives

What is Put/Call Open Interest Ratio?The put/call open interest ratio looks simple: puts outstanding divided by calls outstanding

What is Put/Call Open Interest Ratio?The put/call open interest ratio looks simple: puts outstanding divided by calls outstanding. What makes it useful is not the arithmetic, but the distinction between *positions still on the books* and *today’s trading flow* — a difference that changes how traders read sentiment, hedging, and crowding.Mar 22, 202623 min read

What is Options Skew?Options skew is the reason two options on the same asset and expiration can imply very different volatilities

What is Options Skew?Options skew is the reason two options on the same asset and expiration can imply very different volatilities. It exists because markets do not price upside and downside risk symmetrically, and that asymmetry changes hedging costs, volatility signals, and tail-risk interpretation.Mar 22, 202621 min read

What is Initial Margin?Initial margin looks like idle collateral until markets move fast and a counterparty fails

What is Initial Margin?Initial margin looks like idle collateral until markets move fast and a counterparty fails. Then it becomes the buffer that buys time: enough prefunded value to absorb likely losses while a position is closed out or replaced.Mar 22, 202622 min read

What Is Convexity? How Curvature Shapes Bonds, Options, and HedgingConvexity is what makes derivative risk change as markets move

What Is Convexity? How Curvature Shapes Bonds, Options, and HedgingConvexity is what makes derivative risk change as markets move. It explains why options can accelerate gains and losses, why bond duration stops being enough for large rate moves, and why dealer hedging can sometimes calm markets and sometimes amplify them.Mar 22, 202619 min read

What Is a Gamma Squeeze?A gamma squeeze is not just a fast rally with a dramatic name

What Is a Gamma Squeeze?A gamma squeeze is not just a fast rally with a dramatic name. It is a specific feedback loop: options dealers hedge call exposure by buying the underlying as price rises, and that hedging can itself push price higher when gamma is large.Mar 22, 202620 min read

What Is Open Interest?Open interest looks simple: just count open derivatives contracts

What Is Open Interest?Open interest looks simple: just count open derivatives contracts. But that count carries a deeper signal about participation, leverage, and whether a price move is being powered by fresh positions or just churn between existing traders.Mar 21, 202622 min read

What Is a Risk Engine in Derivatives Trading?A derivatives market is only as stable as the system deciding who can trade, how much collateral they need, and when losses must be stopped

What Is a Risk Engine in Derivatives Trading?A derivatives market is only as stable as the system deciding who can trade, how much collateral they need, and when losses must be stopped. That system is the risk engine: the machinery that turns prices, positions, and model assumptions into margin calls, liquidations, and, in extreme cases, auto-deleveraging or default management.Mar 21, 202625 min read

What Is Mark Price?Mark price is the quiet number that often matters more than the price on the screen

What Is Mark Price?Mark price is the quiet number that often matters more than the price on the screen. In derivatives markets, it is the exchange’s estimate of fair contract value — the price used for margin, unrealized P&L, and liquidation when last trades are too noisy or too easy to distort.Mar 21, 202624 min read

What Are Options Greeks?Options Greeks matter because an option’s price does not move for just one reason

What Are Options Greeks?Options Greeks matter because an option’s price does not move for just one reason. It changes with the underlying price, with time, with implied volatility, and even with interest rates — and the Greeks are the standard way traders turn those moving parts into measurable risk.Mar 21, 202626 min read

What Is Margin Trading?Margin trading matters because it changes the shape of a trade

What Is Margin Trading?Margin trading matters because it changes the shape of a trade. By borrowing against collateral, a trader can control a larger position than their cash alone would allow — but the same mechanism that magnifies gains also creates margin calls, forced liquidation, and losses beyond the original deposit.Mar 21, 202624 min read

What Is Liquidation?Liquidation is what happens when a leveraged position runs out of room

What Is Liquidation?Liquidation is what happens when a leveraged position runs out of room. The exchange, clearing house, or protocol forcibly reduces or closes the position before losses exceed the collateral meant to support it — and that mechanism is central to how derivatives markets stay solvent.Mar 21, 202623 min read

What Is a Margin Call?A margin call is one of the few market mechanisms that can turn a paper loss into an immediate demand for cash

What Is a Margin Call?A margin call is one of the few market mechanisms that can turn a paper loss into an immediate demand for cash. It exists because someone has extended you credit, and when the collateral buffer gets too thin, the lender moves to protect itself.Mar 21, 202625 min read