Subject: Re: Check Capital Management BRK Options Stragegies
It is perhaps worth mentioning that adding call-writing to a long stock position is bearish, not bullish.

Incomplete characterization. Generic and irrelevant to Check Capital's marketing material.

"Adding" call writing is bearish, if you hold the stock. No argument there.

But crudely, it is half bullish. Holding a stock is 100% bullish, writing a covered call is 50% bullish, holding a bond is neutral, holding a bond and selling a put is 50% bullish.
selling naked calls, or shorting the stock is 100% bearish.

So overall, writing covered calls while holding the stock is definitely a bullish strategy as compared to holding a bond or selling the stock short. It cannot be compared to holding a bond index, period.