For positive Net Free Equity interest will be the higher of market bid rates minus a mark - up and zero. (home.saxo)
You can buy to open several thousand of the $ 200 strike without distorting the shares market at all, then in the shares market you bid up Apple to $ 210, now your options contract is trading at $ 11 with $ 10 of intrinsic value, so you just made 1000 % gain and are able to sell to close those call options. (money.stackexchange.com)
This curve, which relates the yield on a security to its time to maturity, is based on the closing market bid yields on actively traded Treasury securities in the over-the-counter market. (fidelity.com)