When I hear a typical fund manager describe his strategy, it goes something like this: "First, we figure out a basic thesis, like 'Interest rates are too low!' or 'Demographic changes in California will raise the value of west coast real estate!' and then we try to get exposure to that by shorting overvalued banks or buying cheap REITS and construction companies." This sounds like typical investment patter -- the kind of thing you might hear from a Soros-level trader or just another hack -- but it's absolutely, terribly misguided.
It's wrong because it isn't a strategy -- it's two strategies. One is very broad Zeitgeist Arbitrage: speculating on how wildly our broad assumptions differ from the facts. But another is Nano Arbitrage: taking advantage of discrepancies between the prices of individual securities (like two banks with different P/E ratios, or two homebuilders with different backlog/revenue ratios). It's strange to claim that both levels of arbitrage are necessary in the same strategy, especially since they require such different skills.
If a manager is really good at figuring out major trends, like which way oil, interest rates, or real estate will go in the next twelve months, why not make a straight bet on them and ignore the other details? What is a smart macroeconomist doing puzzling over 10-Qs? Similarly, if an investor's real talent is in finding disrepancies in valuations, why kill their Sharpe ratio by mixing in macro bets when all it takes is some short-selling and leverage to trade exclusively based on relative value?
Macro investors who are genuinely good at what they do should spend their time coming up with a macro thesis, and invest in it by looking for high-delta opportunities. Usually, that will mean buying directly into whatever variable they're trading (using interet rate derivatives to speculate on interest rates, instead of doing so by proxy with financial companies). An ostensibly macro fund shouldn't have a portfolio like this.[1] There's a promiscuous mixing of skills and strategies here, and the only way I can explain it is that it's a way to trade returns for conventionality -- which has always been a losing trade.
[1] I'm pretty sure I know what they're doing, here: if you want, you can decompose an oil company into a set of call options on oil, where the marginal cost is the strike price and the cost of the option is the fixed cost of producing oil. But that takes one Excel spreadsheet too many -- if these companies are actually undervalued oil assets, why not buy the stock, short the oil, pocket the difference, and forget about the macro thesis?