Warren Buffett reveals his investment strategy and mastering the market (PART 4).

ANDY SEWER: You talked a lot about the tax cuts and the benefits to Berkshire. You didn't really get into the costs of the tax cut, which surprised me a little bit. Are there costs? I mean, is it just free money?

WARREN BUFFETT: Well, it makes a difference. The tax cut we get, for example, our utilities, as I mentioned in the report, that goes to the customers. That's just the nature of utility regulation. But net, we were a significant beneficiary from the tax cut.

Basically, let's just say we had one class of stock. We got two. You and I own a business together, and we think we own all the stock. But the truth is, before the tax cut, the government had a 35% share of the stock on income.

Now they didn't have a share of the assets, but they had a share of the income. And if it wanted to change it to 40, it could've changed it. But fortunately, it changed it to 21. And if we had a private business, if we had a McDonald's franchise together or an auto dealership together-- the third shareholder-- that invisible shareholder, the government-- just handed us back a bunch of the shares of stock. And our shareholders benefited, and a lot of other shareholder benefited.

ANDY SEWER: You talked about Ajit Jain and Greg Abel saying that Berkshire blood flows through their veins. Have they made a difference since they become vice chairs? And then are they like Warren and Charlie?

WARREN BUFFETT: No, they don't have the interaction. They each run a separate business. Ajit does not think about the other businesses. He thinks about the insurance business. And Greg does not think about the insurance business at all. And I think about the money and the capital and so on.

They're running two very big businesses. I mean, Ajit's business has, all told, a couple of hundred billion of assets. And Greg's business has $150 billion of revenues. They both would fit up there toward the top 10 or so in the country in terms of value, maybe the top 15. But they're very big businesses.

ANDY SEWER: But they're not exactly like you two guys?

WARREN BUFFETT: No, Charlie and I have a partnership thinking about the whole place, and we've done it forever now, and we still do.

ANDY SEWER: And Todd and Ted? I didn't see them mentioned.

WARREN BUFFETT: Well, they have $13 billion each, including pension funds, our pension funds, that they run. So the $173 billion we had at year end in equities-- well, we had 173, but we had another $8 billion in pension funds. So of the 180 or so, they had 26 between them that they're managing.

They got total discretion on that. They don't ask me. At the month end, I look and see what they did. They don't do much. They don't do a lot of trading or anything. But I look to see what changes they made.

Todd, for example, he made a couple of small investments in private-placement-type operations. And I know what the businesses do, but I can't tell you their names.

ANDY SEWER: Was one of those-- you made this investment in Oracle, and you sold it. Was that something they did?

WARREN BUFFETT: No, that was not something they did. That was something I did.

ANDY SEWER: Yeah, and you said, you didn't understand it. That's why you sold. But than why'd you get it in the first place?

WARREN BUFFETT: Well, that's a good question to which I do not have a good answer. I know enough about the cloud to know I don't know enough about the cloud.

ANDY SEWER: Right. OK. So Barclays put out a note. They said they were lowering the estimates for Berkshire for EPS. Do you read that stuff?

WARREN BUFFETT: No. Well, I mean, I may read it accidentally, but I don't seek it out to read. I'll put it that way. It just doesn't make any difference. If I spent time reading that, I wouldn't have the time to read 10Ks. And we're not going to do anything different.

I don't know what we're going to earn. As I put in the annual report-- and I really think this is unique-- we do not prepare financial statements monthly for Berkshire. There's just no other company that would do it. But there's no sense doing it.

I know where the money is. I know how the companies are doing, generally, but what difference does it make? Because I'm not going to try and hit any number for the quarter by having a sale on insurance or doing something even worse. And Charlie, he knows where we stand. And we know what businesses are doing well and which aren't. We certainly know where the money is.

ANDY SEWER: Another one-- UBS survey of Berkshire investors says, the five most important things to them are succession, investment performance, M&A opportunities, share repurchase, insurance margins. Do you read that? Does that surprise you?

WARREN BUFFETT: No, but I don't disagree with that. Somebody understands this.

ANDY SEWER: Your own investors.

WARREN BUFFETT: Yeah. Well, that's important. To go back to when I started my partnership in 1956 that Berkshire came out of, there were seven people sitting there at a table having dinner, relatives primarily. And I said, here's the partnership agreement.

It's done under Nebraska law. It's four or five pages. You don't need to read it. But I said, here's a little half page, what I call the ground rules. And I want you to read these, and if you feel OK about that-- about the interaction, what the expectations are, and all of that sort of thing-- then we'll join forces.

And if you don't, it's fine. We shouldn't be partners. If I'm going to have a partnership with somebody, I want to be compatible. And when you have a public company, you can't control who comes in. I can't control some guy comes in and thinks we were going to pay big dividends or split the stock or something like that.

So by my actions and my communications and everything, I want to attract the people from the public market that I want, and I want to keep the others away. Costco was built-- Sal Price, who started the Price Club, I think, he sat down and figured out the customer he didn't want. And he set up a system that would keep away the customer he didn't want.

Who did he not want? He didn't want somebody buying a quart of milk with somebody behind him with a basket of $200 worth of goods waiting for that. So he put in a membership fee. And by putting in a membership fee, he killed all the drop-in business, the business that belonged to the 7-Eleven.

We want Berkshire to keep out people who have expectations about us that are different than ours. Good for them, and I hope they find somebody they fit. But if you're going to run a church, you want your seats to be filled by people that generally want to listen to your form of religion.

And you don't want it to change every week and say, gee, I need a new group. And I'll go out and talk to a bunch of investors and get them to come to my church next Sunday. Because there's only so many seats in the church. There's a 1,645,000 or so A-equivalent shares. And those are the seats, and I want them occupied by people that are on the same page I am.

ANDY SEWER: The Church of Berkshire. Seems like you've got a big weighting in financials. And of course, you finally invested in Jamie Dimon's company. Why banks right now?

WARREN BUFFETT: They're businesses I understand, and I like the price at which they're selling relative to their future prospects. I think, 10 years from now, that they'll be worth more money. And I feel there's a very high probability I'm right. And I don't think they will turn out to be the best investments at all of the whole panoply of things you could do. But I'm pretty sure that they won't disappoint me.

ANDY SEWER: Is climate change changing your insurance businesses?

WARREN BUFFETT: No, it doesn't change the insurance business.

ANDY SEWER: Does it change modeling or something in the business?

WARREN BUFFETT: It would change our insurance business if we were writing 20-year policies. If there was something that changed life mortality adversely to the interests of a life insurance company, you're stuck with a policy for 20 years if you write the life insurance policy. You'll keep paying your premiums if it's adverse to me. That's what's happened in long-term care insurance, for example.

But when you write a policy for one year at a time, see what the developments are. Cars, for example, are much safer to drive than they used to be. There used to be 15 deaths per 100 million miles driven. Now, there's a little over one. On the other hand, they've become much more expensive to fix. That little side view mirror, which used to cost 10 bucks, is now 1,000 bucks or something like that.

So you have things that are changing in terms of, if you're writing collision insurance, you've got to allow for the fact that the windshield, the bumper, all kinds of things, the side view mirror and all that are way more expensive. But if you're writing liability, people aren't going to die as often.

Climate has been changing. But the truth is that you now can buy really big catastrophe limits cheaper than you could buy them in 2005 or thereabouts, allowing for changes in the dollar and concentration of population. So far, rates have come down. That's the reason we've gotten out of the cab business to a great degree.

We were a very big writer of cab business 10 or 12 years ago. We aren't out of the cab business because of climate change. We're because the prices aren't right. And the world will change, and that's got very serious consequences. But it won't change that much from year to year. We've done very well during a period of some climate change.

ANDY SEWER: You've talked about technology advancing faster than our ability to understand it. And I'm wondering if social media, and Facebook, and Google, and Russian trolls coming in, is that maybe an example of that? Are you still worried about that problem?

WARREN BUFFETT: Well, I think cyber poses real risks to humanity. Forgetting about the problem even of misinformation. I'm just thinking of we have railroads running over 22,000 miles of track. And some of them are carrying ammonia. And some of them are carrying chlorine and things. We have to carry them. We have no choice about that. We're required by law to carry them.

I would rather do that in a non-cyber world than a cyber world. There are all kinds of things-- the problem by something like cyber is that it's moving, and it's just unpredictable whether you'll get some crazy guy, like stuck the anthrax in the-- you know, what they can do becomes magnified. You saw what 19 guys did on 9/11.

Tools in the hands or potentially in the hands of either crazy individuals, crazy groups, or even a few crazy governments are really something. And we don't necessarily know what all the tools they have are, and that is moving all the time. Again, Einstein said, I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones. It's a dangerous world.

ANDY SEWER: I don't know if you've following this, Warren, but what do you think of Elon Musk's behavior as a CEO?

WARREN BUFFETT: Well, I think it has room for improvement. [CHUCKLING] And he would say the same thing. It's just, some people have a talent for interesting quotes, and others have a little bit more of a blocker up there that says, this could get me in a problem. But he's a remarkable guy.

I just don't see the necessity to communicate. I think I've got seven tweets, because a friend of mine signed me up for it. And she's called me about 100 times saying, can I tweet this or that? I said yes to her seven times, I guess, or something like that. I've never actually written one myself. I don't even know how to do it.

TO BE CONTINUED