The phrase "further compression" refers to the process of reducing the size or amount of something even more than before. It means making something smaller, tighter, or more compact. Full definition
This may lead to a further compression of risk compensation in markets and higher leverage in the nonfinancial sector. (imf.org)
Markets are also optimistic about emerging market prospects as reflected in strengthening equity markets and some further compression of interest rate spreads. (imf.org)
Here, Suh's daughter dictates the logic by which space is ordered: she sings Korean songs in London and speaks English in Korea; she enquires about an upcoming trip to Seoul and suddenly we're there; she provides the gaze through which we approach an Islington shopping center before the film cuts to the interior of its Korean analogue, hinting at a further compression of space as a function of global capital. (artasiapacific.com)