Global FX volatility hit its highest level since 2011 last month.

As companies pile into debt markets, the difference between swap rates and Treasury yields has gone negative.

Four-week T-bills will likely continue to offer negative yields as U.S. Treasury cuts issuance to keep federal government's spending under debt limit.

Four-week T-bills will likely continue to offer negative yields as U.S. Treasury cuts issuance to keep federal government's spending under debt limit.

If the Fed were to forgo a rate hike on Thursday, it may lose some ability to keep future increases as gradual as the bond market would like.

If the Fed were to forgo a rate hike on Thursday, it may lose some ability to keep future increases as gradual as the bond market would like.

Some expect 2015 to be the worst year ever in terms of the impact of foreign exchange on corporate earnings.

Some expect 2015 to be the worst year ever in terms of the impact of foreign exchange on corporate earnings.