The phrase "already close to zero" is correct and usable in written English.
It can be used to describe a quantity or value that is nearing zero, often in contexts such as mathematics, finance, or scientific measurements.
Example: "The temperature is already close to zero, indicating that we might see frost overnight."
Alternatives: "nearly at zero" or "approaching zero".
With interest rates already close to zero, Japan must resort to other measures.
That option isn't available now because rates are already close to zero.
The only major central bank missing was the Bank of Japan, but its rate was already close to zero.
Official interest rates are already close to zero, so there is a limit to how much they can be cut.
Unfortunately, conventional monetary policy is no longer available: the short-term interest rates the Fed normally targets are already close to zero.
With short-term interest rates already close to zero, the Fed's policy makers have relatively few tools available to encourage consumer and corporate spending.
They noted that the ending of the film shown at Cannes was unclear, even though the running time was already close to two and a half hours.
All these species are put at risk by the destruction of the world's reefs, which is starting to look all but inevitable; already close to eighty per cent of the coral cover in the Caribbean has disappeared.
Interest rates in America (1¼%) are already closer to zero than in the euro area (2½%), which might suggest that America is at greater risk of deflation.
Washington policy makers are confronted with the dangerous combination of a recession, soaring health care costs and an uninsured population that was already close to 40 million last year and could grow substantially in the coming months, experts say.
Harrison spent 15 years as one of the most feared safeties in the N.F.L., and by the time Wilfork joined him on the New England Patriots in 2004, Harrison was already close to becoming one of the elder statesmen of a veteran-laden team.
