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We study the effects of dollar swap lines using high frequency responses in
asset prices around policy announcements. News about expanded dollar swap
lines causes a reduction in liquidity premia, compression of deviations from
covered interest parity (CIP), and depreciation of the dollar. Equity prices rise
and the VIX falls, while the response of long-term government bond prices is
mixed. The cross-section of high frequency responses implies that swap lines
affect the dollar factor or the price of risk. Our findings are qualitatively consistent
with models relating the supply of dollar liquidity to the broader economy.