China’s Stock Markets And Revisiting 2011 Predictions by Michael Pettis’ China Financial Market
I plan to post a new entry very soon but before doing so I wanted to say a few things about the stock markets, which continue to be insane (but not unexpectedly so) and then repost a blog entry that is nearly five years old. By the time I published my latest (July 17) blog entry Beijing had managed to stop the panic with the use of what I called “brute force”, by which I meant that there was never likely to be much impact from interest rate moves, regulatory changes, margin relaxation, and so on. This is because there had been such a remarkable convergence among investors, almost all of who were purely speculative, on how to interpret information, and because any interpretation was likely to be self-consciously skeptical, that any regulatory response had to be completely unambiguous.
There is nothing less ambiguous than actually buying or selling large amounts of shares. In a July 8 message to my clients, I argued that
The panic could only be stopped, in other words, by very visibly forcing institutions under state control to buy heavily, and to prevent them from selling. Other forms of signaling would not work. This is indeed what the regulators did, and they did it powerfully enough that by July 9 they had arrested the panic and set the market off on another surge.
The problem with the surge was that the various “unorthodox” measures used to stop the panic created all sorts of strange convexities and implied options that could either interrupt or speed up the surge, and in a market in which there has been both a convergence of strategies and, what’s worse, a convergence in the way information is interpreted, any interruption in the surge was likely to be brutal. In this market, either we collectively agree that we have decided to buy, or we sell.
There was one measure about which there is some disagreement as to its size and its importance, but this might be more than counterbalanced by the very simple and clear signal it gives:
My worry, as I discussed with my clients, was that as the index approached 4,100 or higher, the threat of intense selling by capital-tight brokers at 4,500 meant that anyone buying shares was implicitly giving away a free call at 4,500, and the higher prices went, the less upside there was and the more downside.
Writing a synthetic put option
By the way remember that if you are long the underlying asset and short a call option, you are effectively short a synthetic put option struck at the same price as the call option. This means that anyone who owns shares might in fact be short a complex synthetic put option on the market. If the writer of the put can cancel the option at no cost, the rational thing for him to do would be to cancel it. In fact he can do so simply by closing out his long position and selling his shares. By the way the fact that most investors do not understand option theory is irrelevant. The option framework predicts how investors will behave as long as they understand that a lot of selling puts downward pressure on prices and a lot of buying upward pressure, and in a purely speculative market, this is pretty much the only thing investors have to understand.
I don’t know if this is indeed what triggered the selling, but on Thursday, July 23, following a string of uninterrupted up days, the market closed at a new recent high of 4,124, after which it dropped sharply every day for the next three days to close down by just over 11%, at 3,663. This is exactly what you would have expected if traders believed that the threat of significant sales when the index hit 4,500 was substantial, or at least if they believed that the market believed it.
This expectation is what matters – or, more accurately, what matters is that everyone knows that everyone else is focusing on 4,500 as a break point. There may or may not be a great deal of selling likely to occur once the index hits 4,500 as brokers are forced by their weak capital positions to sell shares, and opinions vary on this point, but in this kind of market as long as investors believe that this is enough of a possibility for a consensus to form around it, they will act as if it were true. This means, then, that they will act like they have written a put option struck at 4,500, and unless they are absolutely certain that stocks will trade up right through 4,500, they are in the position of being able to cancel their short put any time they like simply by selling their shares.
The market may or may not be thinking this way, but it has certainly acted like it might be. After those three bad days the market traded up on Wednesday by 3.4% to close at 3,789, but then lost faith again Thursday and dropped by 2.2% to close at 3,706. Today, Friday (July 31), the market opened 1.3% lower and except for a few minutes in the early afternoon it was in the red all day to finish at 3,664, down 1.1%. I expect it might