DTN IQFeed® Symbol Guide
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Q: When does it update?
A: The following are update times for various areas of interest.
PROGRAMMABLE QUOTES UPDATE TIME
Amer Dep Receipts (ADRs) OTCBB updates at 5 p.m. CT
Nasdaq NMS -- regular trading hours
Mutual/Money Market Funds 5:10 p.m. CT
Stocks, Bonds 3 minute snapshot
Futures/Futures Options Tick by tick -- delay varies by exchange
Volume and Open Interest Varies by exchange (CME 7 a.m. CBT noon)
Index Options 2 minute snapshot
Indexes Real time, where available
Market Indicators/Statistics Real time
Q: Why is there no bid/ask information provided for NYSE or AMEX stocks and
A: The NYSE and AMEX do not permit delayed quotations of bid and ask prices.
Q: What is the difference between the Theoretical and Actual calculation for
the 30 Industrials?
A: The theoretical value (high/low) assumes that the highs and lows for the
individual components of the index occurred at the same time. An actual value
is just that, the actual value of the individual components at a particular
point in time. Currently, we deliver the actual values for these indices.
Q: How is the S&P 500 premium calculated, and when does the fron month roll?
A: The S&P premium is calculated by using this formula:
Front month future "last" price - current S&P 500 index value = S&P 500
The S&P 500 futures contracts expire on the third Thursday of the contract
month. However, the current lead month rolls to the next contract one week
prior to expiration.
Q: Why is yesterday's closing price adjusted on a stock that went ex-dividend?
A: The previous day's closing price is adjusted by the amount of the dividend.
This is done so that the current day's net change is calculated correctly,
reflecting the value of the company after the dividend payout.
Q: What is beta?
A: Beta is a coefficient measuring a stock's relative volatility in relation
to the rest of the stock market (as measured by the S&P 500 index). Any stock
with a beta greater than one (1) is considered more volatile than the market.
Any with a beta lower than one (1) is less volatile than the overall market.
We provide a beta calculation for stocks on which options trade.