[lotsofmangos]

promising that if Apple heeds his advice, he won’t sell off any of his approximately 53 million shares.

If he really thinks the stock is undervalued, why would he sell in the absence of a share buyback anyway? If he is right then surely he should be buying those shares himself and waiting as the buyback would only be bringing forward a rise, not creating it.

[nly]

It's a good point, but investing more than a certain % of your assets (roughly proportional to your perceived edge) in any one thing, is a bad idea.