Shareholders of RenaissanceRe Holdings Ltd. (RNR) looking to boost their income beyond the stock's 0.7% annualized dividend yield can sell the June covered call at the $300 strike and collect the premium based on the $18.00 bid, which annualizes to an additional 372.6% rate of return against the current stock price (at Stock Options Channel we call this the YieldBoost), for a total of 373.3% annualized rate in the scenario where the stock is not called away..