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10 guides in Finabase Learn
- 52-week high and low The highest and lowest prices a security has traded at over the past year, a common reference for range and momentum.
- All-time high The highest price a security or index has ever reached; a stock at an all-time high has no overhead resistance from past buyers.
- Ask price The lowest price a seller is currently willing to accept for a security; buyers who want to trade immediately pay the ask.
- Bid price The highest price a buyer is currently willing to pay for a security; sellers who want to trade immediately receive the bid.
- Bid-ask spread The gap between the best bid and the best ask, an implicit cost paid by anyone who trades immediately at market.
- Level 2 quotes A market-data view showing the bids and asks at several price levels beyond the best quote, with the size at each.
- National best bid and offer (NBBO) The highest bid and lowest ask for a US stock across all exchanges, which brokers must generally execute at or better.
- Option chain A table listing all available option contracts for an underlying, by expiration and strike, with bids, asks, volume and open interest.
- Ticker symbol The short code of letters that identifies a stock, ETF or other listed security on an exchange and in every quote and order.
- Watchlist A saved list of stocks, ETFs, indexes or crypto you want to follow, shown with live prices so you can track them without owning them.
Educational content, not investment advice. Finabase Learn explains how markets and tools work. It does not recommend any security or strategy, and examples are for illustration only. Investing involves risk, including the loss of principal. Rules and figures are for the United States unless stated and can change — check the cited source before you act.