背景

符合一定要求的IBKR客户可选择提交单次请求，要求接收某个金融产品的实时报价。该服务被称为“快照报价”。传统报价服务会持续更新实时报价，而快照报价不会，这是它与传统报价服务的不同之处。对于不经常交易且不希望根据延时报价下单的客户，快照报价的价格更有竞争力。有关该报价服务的更多信息如下。

报价项目

快照报价包括以下数据：        

• 最后价格
• 最后交易量
• 最后交易所
• 当前买价-卖价
• 每笔当前买价-卖价的交易量
• 每笔当前买价-卖价的交易所

可用服务

 ¹成本基于单笔快照报价请求，且若基础货币不是美元，则会以与美元等值的基础货币收取。

资格要求

• 账户净资产至少须达到10美元或等值方可使用快照报价服务。
• 用户必须运行TWS 976.0或以上版本方可使用快照报价功能。

定价详情

• 报价采用后付费模式，通常在提供快照服务次月的第一周收取。账户现金或含贷款价值的净资产如不足以支付月费，则账户头寸将面临清算。
• AMEX（B/CTA网络）、NASDAQ（C/UTP网络）和NYSE（A/CTA网络）的月费有上限，如用户订阅了快照数据组服务，且当月报价请求的合计成本达到了实时数据服务的价格，则该月剩余时间用户无需支付额外费用即可使用实时数据服务。在达到快照数据费用门槛后，系统将于美国东部时间下一工作日的18:30左右切换为实时报价。月末，实时报价服务会自动终止，次月快照费用则重新开始累计。每项服务的费用均单独累计，一项服务的报价请求不得与另一项服务合并来应用上限。详情请见以下表格。

 ²要求订阅美国证券快照和期货价值数据组。
 ³要求订阅美国证券快照数据组。

请求快照报价

桌面版交易——标准模式TWS：

如您已能看到延时数据且启用了快照报价，则您可在“代码行动”栏下看到“快照”按钮：

点击“快照”按钮后会出现报价详情窗口。一旦系统收到了该产品的NBBO（全国最佳买卖价）报价，报价详情窗口会即刻生成一个时间戳并显示NBBO信息：

在报价详情窗口中点击刷新链接会更新NBBO报价。 

举例：

在上例中，GOOG是一家在纳斯达克（C/UTP 网络）上市的公司。每请求一次报价（一次快照）的费用为0.01美元。

• 非专业用户最多可再请求149条GOOG或任意其它在纳斯达克（C/UTP 网络）上市的股票的快照数据，超过149条将切换为实时报价。
• 专业用户最多可再请求2449条GOOG或任意其它在纳斯达克（C/UTP 网络）上市的股票的快照数据，超过2449条将切换为实时报价。

您请求快照数据产生的费用不会超过上限。一旦达到上限，该月剩余时间将不会产生新的费用，且您将收到该产品的实时数据。

桌面版交易——TWS魔方：

如您已能看到延时数据且启用了快照报价，选择监控标签下的某一行后，“定单输入”窗口会显示请求快照数据的选项。

点击+快照链接后会出现报价详情窗口。一旦系统收到了该产品的NBBO报价，报价详情窗口会即刻生成一个时间戳并显示NBBO信息：

在报价详情窗口中点击刷新链接会更新NBBO报价。

客户端：

如您已能看到延时数据且启用了快照报价，在买价/卖价下的“定单委托单”窗口内，您将看到快照链接：

点击快照链接后会出现报价详情窗口。一旦系统收到了该产品的NBBO报价，报价详情窗口会即刻生成一个时间戳：

在报价详情窗口中点击刷新链接会更新NBBO报价。

网络交易——网络交易者（WebTrader）：

如您已能看到延时数据且启用了快照报价，在“市场”标签下的“额外数据”栏上您将看到“快照”数据：

点击“快照”按钮后会出现报价详情窗口。一旦系统收到了该产品的NBBO报价，报价详情窗口会即刻生成一个时间戳：

移动交易——移动IBKR应用：

在报价界面点击任意产品代码会扩展报价框。如您已能看到延时数据且启用了快照报价，您将看到“快照”链接：

点击“快照”链接后会出现报价详情窗口。一旦系统收到了该产品的NBBO（全国最佳买卖价）报价，报价详情窗口会即刻生成一个时间戳并显示NBBO信息：

IBKR does not make available real-time index levels for indices published by the FTSE Group. This is due to the disproportionately high licensing fees FTSE would require of IBKR.

Affected indices are the FTSE 100 and the FTSE MIB 40.

You may instead refer to the “Last” prices for IBKR CFDs IBGB100 and IBIT40 respectively, which are the mid-points of the CFD quotes, and an accurate real-time reflection of traded prices for the futures contracts related to these indices.

Specifically, the Index CFD quotes are based on synthetic indices calculated by back-adjusting the price of the related near-month future for fair value.

In the futures market, fair value is the equilibrium price for a futures contract. It is the price at which an investor effectively pays the appropriate rate of interest, and is compensated for the dividends he forgoes by holding the future rather than the underlying shares. To create the synthetic indices, the fair value adjustment is reversed.

The result is not necessarily exactly the same value as the cash index, in particular because the future may trade above or below its fair value. But as noted above, it is an accurate real-time reflection of the markets related to the index.

While you cannot compare e.g. the IBGB100 directly to the FTSE 100 in TWS (since we do not display the latter), you can observe the relationship between other Index CFDs and cash indices by comparing, for example, the IBUS500 to the S&P 500 index.

INTRODUCTION

As a matter of policy, and to minimize the likelihood of a low-balance account falling out of margin compliance and being subject to forced liquidations, IBKR enforces a minimum equity requirement as a prerequisite for subscribing to real-time market data.

This requirement works as follows: Once an account has met the minimum equity requirement necessary to subscribe to data, it is allowed to maintain those subscriptions as long as it has the funds available to pay for those subscriptions and its equity remains above the minimum level.  Once equity falls below the minimum level, it will be required to restore equity to at least the minimum level before resuming subscriptions.

While clients are not required to subscribe to real-time quotes through IBKR as a condition of trading, those that do are encouraged to maintain equity well above the maintenance level to avoid any fluctuations that would impair continuity of subscriptions.

Minimum equity thresholds vary by account type and are outlined in the table below.

EQUITY MINIMUMS

¹ Denominated in USD, but applied in USD equivalent for accounts with a Base Currency other than USD.

² Represents amount necessary to qualify for subscription renewal in any month following initiation.

The state of Connecticut imposes a sales and use tax which is applicable to online access to information including all data and access fees.

The tax rate as of 2017 is 1% and is applicable to clients with the state of legal residency of Connecticut or a Connecticut permanent/resident address.

The sales and use tax will be applied to all research and market data subscriptions as well as special connections such as VPN, IB Gateway, Extranet and Dedicated Leased Lines.

The sales and use tax will be passed through to client accounts at the time of the subscription billing. The tax is only applicable if a monthly fee is charged, therefore should an account receive a waiver the sales and use tax will similarly be waived.