Fair Market Value
WS
Business: wss://business.polygon.io/options
Stream real-time Fair Market Value (FMV) data for a specified options contract via WebSocket. This proprietary metric, available exclusively to Business plan users, provides an algorithmically derived, real-time estimate of an option’s fair market price. By delivering accurate, continuous valuation data, this feed supports more informed options trading decisions, enhanced analytics, and improved risk management.
Use Cases: Pricing strategies, algorithmic modeling, risk assessment, investor decision-making.
Parameters
ticker
string
required
Specify an option contract. You're only allowed to subscribe to 1,000 option contracts per connection.
You can also use a comma separated list to subscribe to multiple option contracts.
You can retrieve active options contracts from our Options Contracts API.
Response Attributes
ev
enum (FMV)
The event type.
fmv
number
Fair market value is only available on Business plans. It is our proprietary algorithm to generate a real-time, accurate, fair market value of a tradable security. For more information, contact us.
sym
string
The ticker symbol for the given security.
t
integer
The nanosecond timestamp.