Some stylized facts of FX liquidity

A paper of the University of St. Gallen shows that foreign exchange liquidity has been highly correlated across currency pairs, apparently more so than in equity markets. Liquidity correlation has been strongest in developed FX markets and particularly in volatile currency pairs. Bond and equity markets seem to have a bearing on systematic FX liquidity. Feedback loops between market illiquidity and funding constraints can escalate into fire sales. Riskier currency pairs, and particularly those related to carry trades, are more susceptible to liquidity shocks.

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