NY -- Standard&Poor's CreditWire 4/10/96 -- Standard&Poor's today has placed its single-`B'-plus subordinated debt rating of Waterhouse Investor Services Inc. on CreditWatch with positive implications, following the announcement of an acquisition of Waterhouse by The Toronto-Dominion Bank Toronto, Canada. This action affects $50 million of rated debt. At the same time, Standard&Poor's has affirmed all of its ratings of Toronto-Dominion Bank (see list below for ratings), affecting about US$2 billion of rated debt. These ratings are not on CreditWatch. Waterhouse is a successful and rapidly expanding discount broker whose performance reflects currently strong trading volumes, an ongoing market trend in favor of discount brokers and market-share gains. Capital is adequate, given the low-risk nature