Goldman shares were sinking $15.93, or 6.9%, to $213.67, and JPMorgan lately shed 2.1% to $42.23. The NYSE Financial Sector Index, which tracks all of the above stocks, surrendered 2.3% to 8,729.67. The KBW Bank index lately slid 2.1% partly thanks to Citi and JPMorgan. In more management changes, MasterCard ( MA) announced the retirement of COO Alan Heuer at year-end 2008 as well as a raft of immediate executive shuffling, including CFO Chris McWilton shifting to President, Global Accounts. Tyco International's ( TYC) Martina Hund-Mejean will succeed him as CFO. Shares of the Purchase, N.Y., credit card issuer dropped 3.3% to $183.84. H&R Block ( HRB) said CFO William Trubeck has resigned , sending shares of the Kansas City, Mo., tax preparer down 5.1% to $19.55. Becky Shulman was appointed acting CFO. Elsewhere, Credit Suisse ( CS) lost 2.1% on a Bear Stearns downgrade to peer perform from outperform following last week's report of dwindling third-quarter earnings. A Credit Suisse analyst meanwhile lowered Nelnet ( NNI) to neutral from outperform a trading day after the student lender reported swinging to a third-quarter loss. The analyst, along with a couple of others, primarily cited a new federal law cutting education-lending subsidies -- the same one that was crucial last month in unraveling Sallie Mae's ( SLM) proposed takeout by a J.C. Flowers-led buyer group. Nelnet lost 88 cents, or 5.2%, to $16.07.