Monitor unusual options activity for tracked equities (large call/put prints by notional value)
Answers whether unusual, large options activity is showing up in tracked stocks. It reads each equity's options chain, focusing on unusual or reported trades and summing call versus put notional for prints above $500K. It computes a put/call notional ratio, but only raises an unusual-flow watch when the data is licensed real-time and near-live; otherwise it suppresses the watch and notes the data is delayed. Use flagged names as positioning context, not confirmed intent; it matters because big prints can be directional bets or hedges, and only licensed real-time data supports a trustworthy flow read.
The same flow inference as its crypto counterpart, plus a data-licensing constraint that is worth understanding on its own terms.
THE MEASUREMENT. Each equity's options chain, focusing on unusual or reported trades, summing call against put notional for prints above $500,000 and computing a notional put/call ratio.
THE INFERENCE PROBLEM, in brief, because it is identical to the crypto case and is the heart of every 'unusual options activity' claim. A print says a contract traded; it does not say who initiated it, so buyer and seller cannot be told apart with certainty. Multi-leg structures - spreads, collars, risk reversals - execute as separate legs and each leg looks directional on its own. A large call print is as consistent with someone WRITING calls against stock they hold as with someone buying them. And notional weights by contract size rather than by risk, so far out-of-the-money strikes with tiny delta can dominate a notional ratio while carrying almost no exposure.
THE PUT/CALL RATIO HAS A LONG HISTORY as a contrarian sentiment measure, on the reasoning that extreme readings mark crowded positioning. It comes with the caveat that its evidence is mixed, that its usefulness has varied as the composition of options volume changed, and that a ratio built from LARGE PRINTS is a different quantity from the exchange-wide ratio the classical literature studied.
THE LICENSING CONSTRAINT, and this is the part specific to equities and genuinely instructive. US options data is available in real time under licence and, more cheaply, on a delay. This analysis raises an unusual-flow WATCH only when the data is licensed real-time and near-live; otherwise it suppresses the watch and says the data is delayed.
WHY THAT DISTINCTION IS NOT PEDANTRY. The entire premise of flow analysis is timeliness - the claim is that someone is positioning ahead of a move. On delayed data the move may already have happened, so the same computation supports a much weaker claim. Suppressing the alert rather than raising one on stale data is the correct behaviour, and it is the same discipline as an analysis that skips when its inputs are absent: the output is downgraded to match what the data can actually support, and the reason is stated rather than hidden.
A student should generalise from this. Ask of any signal not only what it measures but WHEN it was measurable, because a signal that is only true in real time is a different instrument once delayed.
The $500,000 threshold is our own convention.
Published reports are readable without an account. The newest is Ether (ETH) and XRP extend a month-long slide as Bitcoin falls below $75,000: trend, momentum and news (Nov 9, 2026). Create an account to run research on the stocks and crypto you choose.