It's not a linguistic trick. It used to be that banks had to keep a certain percentage of they money they had on deposit on the premises. Slowly, this amount (the "reserve rate) was lowered to 0% under Obama.
Source for this? AFAIK it was done this year, under trump not obama.
>As of March 2020, the minimum reserve requirement for all deposit institutions was abolished, or more technically, fixed to zero percent of eligible deposits. The Board previously mandated a zero reserve requirement for banks with eligible deposits up to $16 million, 3% for banks up to $122.3 million, and 10% thereafter. The removal of reserve requirements followed the Federal Reserve's shift to an "ample-reserves" system, in which the Federal Reserve Banks pay member banks interest on reserves that they keep in excess of the required amount
https://en.wikipedia.org/wiki/Reserve_requirement#United_Sta...
https://tradingeconomics.com/china/cash-reserve-ratio
and a bunch of other yields, which connect to the the rate paid on reserves, the rate on excess deposits, fed funds, libor etc etc.