I want to open an account this week for currency and futures trading. One quick question: (copy and paste from their website) Customer securities accounts at Interactive Brokers are protected up to $30 million (including up to $1 million for cash). The market value of your stocks, options, warrants, debt, and cash -- denominated in all currencies -- is covered by this insurance. Futures, options on futures, and single stock futures are not covered, but available cash will be swept from your futures account to your securities account periodically to take advantage of insurance coverage as much as possible. As with all securities firms, this insurance provides protection against failure of a broker-dealer, not against loss of market value of securities. What does "periodically" mean? I plan to swing trade for a few days Please advise. Many thanks in advance!