Health Care REIT to join S&P 500

Standard & Poor's said Thursday Health Care REIT Inc., a a health care real estate investment trust, will replace Sovereign Bancorp Inc. in the S&P 500 on a date to be determined.

Sovereign is being acquired by Spanish bank Banco Santander SA.

Health Care REIT will be replaced by International Bancshares Corp. in the S&P MidCap 400 index.

Shares of Toledo, Ohio-based Health Care REIT climbed $1.17, or 3.2 percent, to $38.25 in after-hours trading. The stock had closed down 93 cents at $37.08 in the regular session.

Shares of International Bancshares climbed 58 cents, or 3.7 percent, to $16.07 after hours. The stock had closed down $1.41, or 8.3 percent, at $15.49, in the regular session.