The Financial Conduct Authority chief executive has said a study of introductory rates for savings in banks will enable the FCA to better understand the dynamics that drive the market and the decisions that consumers make.
Martin Wheatley said: "We know that switching rates are low for financial services products and savings accounts are no exception.
"Even when people do switch their accounts, they are twice as likely to go with their existing provider than move to the offering of a competitor."
The use of introductory rates to tempt savers is to be reviewed by the financial regulator as part of a wider study into the £1 trillion cash savings market.
The Financial Conduct Authority wants to assess whether competition is working in the best interests of consumers, particularly in terms of them getting the best returns possible and information to meets their needs
As well as teaser rates, where introductory deals are offered to new customers, the FCA will want to know how often consumers switch their savings accounts.
Britons are saving more than ever before, according to new findings.
Treasury-backed savings body NS&I found that savers are putting 8% or £104 of their income aside each month - the first time the sum has broken the £100 barrier.
People aged 25 to 34 are putting aside just over 9% of their incomes each month - or £125 - the highest average figure recorded for this group since 2010.
John Prout, NS&I retail customer director, said: "The research suggests that most age groups in Britain are saving more and this corresponds with an increased use of savings goals from last summer, which can only be an encouraging sign for the future."
Greater flexibility may be needed in pension saving, the head of investment propositions at Scottish Widows has said in response to a new study that shows that the next generation may have to start saving at 25 years old to retire by their 70s. Iain McGowan said:
Offering more flexibility that combines the accessibility of an Isa with the tax benefits of a pension could help future generations face up to the twin challenge of saving for short-term financial hurdles like a deposit for a mortgage or a wedding while at the same time setting aside enough for retirement.
– Iain McGowan, head of investment propositions at Scottish Widows
In the future, older workers - especially in the professional and business services sector - are likely to stay working longer into their 70s, but the nature of this work will become more flexible and probably more part-time.
Workers in manual or vocational careers are also likely to look to extend their working lives by undertaking a less strenuous, more part-time role.
The next generation face being in their 50s before they have paid off their student loans and in their 60s before they are mortgage free, research has shown today.
The Scottish Widows study argued that rising life expectancies, combined with people being saddled with large debts earlier in life, mean that today's children should start saving for their retirement at the age of 25 if they want to enjoy a comfortable old age.
Economist Steve Lucas argued that financial pressures from university and housing costs will mean that the next generation will only be able to afford smaller pension contributions, meaning they need to start saving from around 25 years old to prepare for 30 years of retirement.