There's copious praise for Goldman Sachs today, Wall Street's "shiniest sausage machine", from the FT's Lex.
No, the bank hasn't started its own proprietary trading platform for pork bellies. Instead, it made $2.09 billion in its second-quarter results yesterday. That's down 11% on last year, but in the context of shockingly poor performances across the rest of the Street, not bad.
Lex notes:
Goldman made just less than $20 in net revenue from its fixed income, currency and commodities and equities trading businesses for every $1 of net VAR exposure – down almost 30 per cent quarter-on-quarter and down 45 per cent on the average for the previous 12 months.
Part of this is beyond the bank's control, of course. VAR models are reactive to recent market conditions, as historical data is used to calibrate them. So when markets were placid last year, some risk managers complained that VAR models were understating risk. Conversely, with market volatility now much higher in most cases, some say VAR models may well be overstating it.
Nonetheless, some bankers say these changed market conditions have led to increasing pressure upon them to reduce risk across business lines. But the way VAR models calculate risk means this too can lead to perverse incentives.
One London-based senior currency options trader recently mentioned an example to me involving credit prices and the level of the dollar-yen exchange rate. As recollected in Risk during May, yen carry trades were particularly popular among hedge funds before the credit and liquidity crisis took hold last year. As many funds looked to reduce risk in its wake by buying back yen, the Japanese currency began on an upward trend against the dollar while credit prices tumbled. If this correlation were taken into account in VAR models, he asserted, bank risk managers could look to, say, offset group-wide long credit exposures by buying the yen against the dollar.
There will be more on the potential problems with VAR in July's edition of Risk. Meanwhile, as you ponder the voluminous tributes to Goldman Sachs in the press, you might also want to consider the reported layoffs.
Mark Pengelly is blogging while Alexander Campbell is away.