Financial exchange traded funds moved lower Monday morning and were the worst-performing sector ETFs after Citigroup (NYSE: C) analysts scaled back their second-quarter profit forecasts for several large banks.

Citigroup slashed its estimates for Morgan Stanley (NYSE: MS), Goldman Sachs (NYSE: GS) and JP Morgan (NYSE: JPM), according to reports.

Also Monday, PNC Financial Services (NYSE: PNC) fell nearly 3% after the lender said it will buy Royal Bank of Canada’s retail operations for over $3 billion.

The largest sector ETF by assets, Financial Select Sector SPDR Fund (NYSEArca: XLF), slipped 0.5% in recent action.

The fund was down 6.4% for the year-to-date period ended June 17, according to Morningstar, as large-cap banks have declined on economic worries and the potential impact of tougher capital rules.

M&A hopes for the banking sector were boosted, however, following Capital One’s (NYSE: COF) $9 billion bid last week for ING Direct (NYSE: ING).

Conversely, shares of ratings agencies traded lower last week  after The Wall Street Journal reported U.S. securities regulators are mulling civil charges against the firms for their role in facilitating mortgage-bond deals that helped trigger the credit meltdown. [Capital One, Ratings Agencies in Focus]

Financial Select Sector SPDR Fund