ME's sharp deposit pricing lately around the bonus saver and term segments of the deposit market is paying off. ME, along with ING, is the beneficiary of a consumer shift away from major banks in June.While June is viewed by some in the banking industry as a typically weak time for retail deposit flows, the latest official data published by APRA reveals that the final month of the 2017 financial year was a particularly bleak thirty days for most ADIs.According to APRA, the size of the household deposits market contracted by more than A$3.5 billion or 0.4 per cent to $844 billion over June 2017 compared with May.This is the sharpest fall in the size of the bank deposit segment in Australia across a single month in at least five years.Most banks and credit unions suffered outflows, with the major banks absorbing the biggest hits.Deposit outflows were especially noteworthy at AMP Bank and ANZ where the value of retail cash held at these banks declined by 3 per cent and 0.9 per cent, respectively.ANZ's retail deposit base fell by more than $1 billion to $114 billion. However, all the major banks suffered big declines and loss of market share:- CBA customers made net withdrawals of almost $1.1 billion (down 0.45 per cent); - Westpac declined $915 million (down 0.46 per cent); and- NAB's deposit base fell $752 million (down 0.62 per cent).A string of regional banks also lost ground including Bank of Queensland (down 1.5 per cent). Suncorp and Bendigo & Adelaide Bank both recorded marginal declines.ING Direct and ME were among the standout winners. ING Direct consolidated its ranking as Australia's fifth largest holder of consumer deposits, growing its retail deposit base by $176 million to $27 billion.ME's growth was even more impressive in June, in percentage terms, after the bank added $137 million to take its household deposit book to $5.95 billion.ME's rapid growth indicates that its aggressive pricing strategy in the bonus saver and term segments of the deposit market is helping it to win new customers."ME maintained steady growth in its retail deposit book in June as the bank worked to fund continued solid credit growth," a bank spokesman said."We've been growing our loan book at 'above-system' throughout the year and have correspondingly seen 'above-system' growth in our deposit book."Most of the largest customer-owned banks -  Auswide, Defence Bank and Unity Bank -  also expanded their deposit books in June.However, the prize for the fastest-growing deposit-taker was claimed by the Bank of China, which expanded its holdings of consumer deposits by $52 million to crack the $1 billion milestone.The latest banking data is likely to be of interest to economists and Reserve Bank boffins, who already this year have highlighted the pressures weighing on the domestic household sector.The magnitude of these declines can neither be understated nor accounted, allowing for industry perceptions that consumers are more prone to spending in June.After all, the size of the retail deposits pie actually expanded in June last year, when CBA,