Warren Buffett's big multi-billion dollar bet that stocks won't end up lower years from now gets some attention and analysis in this weekend's Barron's.

In an article headlined Here's How Buffett Spent 2007 (paid subscription required until Monday afternoon when it becomes free content), writer Andrew Bary points out that "for someone who has been publicly lukewarm on the equity market, Warren Buffett has been buying a lot of stocks for Berkshire Hathaway."

Bary notes that during 2007, Berkshire bought just over $19 billion dollars of equities, twice last year's $9.2 billion. That's an average of $75 million in buys for each business day. Berkshire's net stock purchases (stocks bought minus stocks sold) during the year totaled $11 billion.

But Berkshire is not just buying individual stocks. Barron's underlines the section on page 16 of Buffett's annual Letter to Shareholders in which he describes "various put options we have sold on four stock indices (the S&P 500 plus three foreign indices.)"