The Security Exchange Commission and its equivalents in several other countries have banned short selling of financial stocks. As a result, financials rallied on Thursday and Friday.
This was an utterly dumb move that will have some bad side effects. The financial stocks did not sink because of short selling, but because those companies are in bad shape and their future profits, if any, will be small.
While the SEC measure will prohibit small investors from profiting on the downturn, big investors have a very easy way around this.
They will simply go short on complete indexes like the Dow Top 30, FTSE 100 or S&P 500 and will then go long, i.e. buy, all single stocks in that index that are not the ones they want to target. The net effect is a short position on the targeted financials only.
It will take a day or two for large hedge funds to set this up effectively and reprogram their computers to automate the process. Then the financial stocks will sink again as is appropriate.
The SEC would have to prohibit all index option trading to prevent this, but that would freeze and ruin lots of investors like pension funds that have done nothing wrong.
To ban shorts on financials was a stupid step, an outright manipulation of the markets and a warning to all. The SEC, Fed and Treasury are quite capable to take more such steps and thereby turn the already bad situation into a even worse one.