Like the untraded US rates liquidity index (USRLI), the CLX is constructed as a sum of the Sharpe ratio – deviations from the mean divided by volatility – of various market factors, such as equity volatilities, Treasury rates, swap spreads, corporate bond swaption-implied volatilities, and structured credit spreads. Citi will make the CLX tradable by using fixed historical values for the mean and volatility parameters, eliminating the need for costly recomputation from lengthy time series.
Although the design of the index serves as a proxy measure for liquidity, Terry Benzschawel, a managing director of quantitative credit trading strategy at Citi in New York and head of the team researching the product, says it also tracks more traditional measures such as bid-ask spreads, trading volumes and the USRLI. He compares the potential impact of CLX to that of the interest rate swaps market.
"The great thing about the index is that it hedges your funding costs while being very simple to trade. I believe it will reduce the systemic risk in the industry, akin to how the advent of swaps means people don't worry about interest-rate exposures any more – they just pay a fee to hedge it," he says.
Like a swap, the contracts envisaged by Citi would be entered into without an up-front premium, with money changing hands according to the index's movements around a fair strike value.
The team is in talks with multi-dealer platforms over distribution rights, although Benzschawel expects most large banks, including Citi, to move into the market eventually. He has also drawn up a hedging strategy for sellers of the index, although he would not comment on the details.
"We are focused on viewing it from a brokers' perspective – we want to get natural buyers and sellers of liquidity together. But we do have an explicit hedging programme, based on the underlying assets in the index. There is a basis risk, but the beauty is that as this widens, the strategy involves buying up assets whose prices are falling, thereby providing liquidity to the market," he says.
However, there is concern from academic circles that the counterparty risks involved in such a product could create moral hazard. Chris Rogers, chair of statistical science at Cambridge University, said the only participants able to sell CLX-based products would probably be those who are too big to fail.
"This is basically a kind of insurance product. The main issue is: how good is the party issuing it? If it's going to be paying out huge numbers in the event of a crisis, will it be able to meet it obligations? Insurers can buy reinsurance for their liabilities, but the buck has to stop somewhere – there's a limit to how much a private insurer can pay out. Only the government can cover unlimited losses," he says.
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