Investment banks do provide valuable services: market making (providing liquidity in many markets), capital raising, the creation of financial instruments so investors can hedge against certain kinds of risk and so on.<p>Unfortunately I think we're reaching the point of banks overstepping their bounds and creating far more problems than they really should.<p>This strategy seems similar to the "demand shock" approach they used in driving up wheat prices in recent years. And of course the subprime crisis was the result of lax regulation, arguably criminal negligence by Standard & Poor's and Moody's (who rated certain baskets of loans as AAA) and a lot of players who simply didn't have to bear any risk.<p>I'm really not sure what the solution is here but something really needs to bring this system into check. Such paper shenanigans are having real negative consequences.<p>In Australia we have a strict financial regulation regime, arguably too strict in some cases, but we didn't have the bubble in real estate prices that the US did. "No doc" and "low doc" lending never reached the point of collapsing the market.<p>One could argue that financial regulation is to blame and you're probably right but I have no faith in the US government's ability to correct this or pretty much anything else. Washington now seems to be nothing more than a battleground for special interest lobbying and ideologues devoid of rationality.<p>In the past ~30 years or so investment banks have generally undergone a change from being a partnership to being a corporation. The major difference between the two is partnerships have unlimited liability. Much like a law firm, the partners are <i>personally</i> liable for losses.<p>I've come to the conclusion that this change has been detrimental to the function of the financial industry as a whole. Combine this with Federal government bailouts and investment bankers seem to act with complete impunity with regards to risk.<p>Something needs to change.