US STOCKS-Futures dip ahead of data, indexes near records
* ADP and ISM non-manufacturing data on tap
* Many investors worry about low volume and volatility
* Protective Life jumps in premarket, Dai-ichi to buy
* Dow up 4 pts, S&P down 1.9 pt, Nasdaq down 4.75 pts
By Ryan Vlastelica
NEW YORK, June 4 (Reuters) - U.S. stock index futures mostly edged lower on Wednesday as investors refrained from making large bets, with indexes near record levels, ahead of data on the labor market and services sector.
* Equities have been strong lately, with the S&P 500 up for seven of the past nine sessions, hitting multiple records over that period. However, the gains have come in anemic trading volume, suggesting the rally lacks conviction.
* Trading catalysts could come with the 8:15 a.m. (1215 GMT) release of ADP's May data on private sector employment, which is expected to show 210,000 jobs added last month, fewer than in April. After the market opens, the Institute for Supply Management's May read on services will be released; analysts expect it to rise by 0.3 to 55.5.
* Recent data has pointed to economic improvements, raising hopes for the May jobs report, which will be released on Friday. Analysts expect 218,000 jobs to have been added in May. Continuación...