Caiff busnesau sy'n gwerthu nwyddau'n uniongyrchol i'r cwsmeriaid sy'n eu defnyddio eu diffinio fel manwerthwyr. Yr ystadegyn allweddol ar gyfer manwerthu yw'r Mynegai Gwerthiannau Manwerthu (RSI), a gyhoeddir yn fisol. Mae data yn y RSI yn ymdrin â gwariant ar nwyddau yn unig (mewn siopau ac ar-lein). Mae data am wario ar wasanaethau ar gael ym Mynegai Gwasanaethau (IoS).
In the three months to March 2018 (Quarter 1), the quantity bought in retail sales fell by 0.5% when compared with Quarter 4 (Oct to Dec) 2017, with declines in all sectors except for department stores and non-store retailing.
The month-on-month growth rate fell by 1.2% due to a large fall of 7.4% from petrol sales; a likely consequence of adverse weather conditions, which impacted travel.
Department stores were the only sector to show positive growth in March at 0.8%, with feedback from retailers suggesting that online offers for Mothering Sunday and Easter boosted internet sales more than usual during the adverse weather.