What we prefer to do is operate our investment bank in a way that is like what investment banks used to be, which is a middle man - someone who is here to match people who need capital with people who have capital - and not position ourselves at the center of that by taking big positions on a trading stance.

That's what 'The Trail' ended up being, this delightful way of exploring and managing your backpack and crafting and collecting and trading with other players, doing all that in this really delicious way. When we finished that and released it on iOS and Android, tens of millions of people loved and enjoyed it.

We are seeing more managed money and, to an extent, institutional money entering the space. Anecdotally speaking, I know of many people who are working at hedge funds or other investment managers who are trading cryptocurrency personally, the question is, when do people start doing it with their firms and funds?

We have been developing an ever closer relationship with China on climate change for many years which has led to collaboration on carbon trading, offshore wind development, on low-carbon buildings, on nuclear energy, and on carbon capture and storage - to name just some of the ways in which we're working together.

The Internet rewards scale; by trading higher up-front costs for lower marginal cost, market leaders can invest in better technology and service. As a result, there is nothing online that is both great in quality and small in scale. Amazon wasn't originally a better bookstore than the small shops we mourn, but it is now.

I have very little respect for the integrity of the trading on the exchange in most stocks. And I have particular disdain for the fact that the SEC has failed to deal with high-frequency traders who are doing nothing more than taking advantage of inside information, a buy or a sell order, because of technology advantages.

As a society, we have this perception that women are emotional. The research, however, tells us that, on trading floors, that poor risk rises and falls with testosterone levels, and these trading floors are 85 percent, 90 percent male, and these gentlemen tend, under periods of stress, to show off for each other. That's dangerous.

Criminal justice, as it pertains to the Goldmans and Morgan Stanleys of the world, is not adversarial combat, with cops and crooks duking it out in interrogation rooms and courthouses. Instead, it's a cocktail party between friends and colleagues who from month to month and year to year are constantly switching sides and trading hats.

I am proud of the fact that the U.K. is an open trading country. I welcome inward investment such as that of Nissan, and the takeover of struggling British companies by foreign companies who turn them around, as in the case of Jaguar Land Rover. I also accept that job losses sometimes have to occur to restore failing companies to health.

The Fed should make a clear commitment to stable money to reduce the swings in interest rates and inflation. Instead, it champions and flaunts unstable money. This encourages momentum trading and the growth of derivatives. Meanwhile, layers of financial regulation make Washington bigger and more powerful but don't fix the underlying problems.

The way the textbook works is you have gains from trade that should be distributed across all the trading partners. As soon as one bad actor like China massively cheats, they win at the expense of us; they win at the expense of Europe, and over time, it threatens the entire integrity of the global financial system and the global trading system.

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