markets

The Betfair exchange, Inefficient efficiency

One of the questions that people often ask me is whether the markets are easier to trade than they were 10 or 20 years ago? Are the markets following efficient market theory on the Betfair exchange, so are they more efficient now? Eugene Fama was ‘famous’ for the efficient market hypothesis, though his work was mainly aimed at…

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Most and least volatile racecourses to trade

I did a tweet recently that stated a little trading fact, that Chelmsford City was the most volatile course. I had a fairly immediate retort, that stated it wasn’t a fact but was ‘just’ an opinion. It was actually a carefully researched fact.

Volatility

I’ve collected data on volatility right from day one of my trading journey and have built up a massive database of data. One of the things I study is how volatile the market is.

I measure …

Finding value in malevolent markets

You will be forgiven for thinking that humanity is an outdated concept that should be replaced.  But they do say, to err is human. But to completely screw up, you need a computer!

Flash crashes

The stock market was set up to allow companies to raise investment capital from investors. A simple and effective concept that works. But modern financial markets are more like a giant casino. You can still raise funds, but the aftermarket dominates the central purpose. The …

Do Betfair markets reflect true opinion?

OK, for years the exchange mechanism has provided a very useful pricing mechanism. A careful aggregation of demand between people competing on a level playing field and it has provided a beautiful insight into the way free markets can work to mysteriously, accurately, price an event –  in this case the prediction that something will win a sports event.

Changes

But we have been watching closely as the market has gradually decoupled from it’s long established core. What do we mean …