US STOCKS-Futures flat after five-day winning streak
* 'Quadruple witching' may boost volume, volatility
* Oracle slumps in premarket after results
* Futures up: Dow 3 pts, S&P 0.5 pts, Nasdaq 1.75 pts
By Chuck Mikolajczak
NEW YORK, June 20 (Reuters) - U.S. stock index futures were little changed on Friday, on the heels of a five-day rally in the S&P 500 that sent the benchmark index to its latest record high, putting it on track for its fourth weekly gain in the last five.
* Investors may see a spike of volume and volatility at the open and towards the closing bell as Friday marks a "quadruple witching" day - the expiration of stock options, index options, index futures and single-stock futures - as traders close hedging positions or roll them over at the last minute.
* Oracle Corp shares were down 5.5 percent to $40.19 before the opening bell after it posted fourth-quarter results that disappointed investors looking for more progress against rivals selling web-based services.
* Five days of gains in the benchmark S&P index marked its longest winning streak since mid-April. For the week, the index is up 1.2 percent, while the Dow is up 0.9 percent and the Nasdaq has gained 1.1 percent.
* S&P 500 e-mini futures were up 0.5 point and fair value - a formula that evaluates pricing by taking into account interest rates, dividends and time to expiration on the contract - indicated a flat open. Dow Jones industrial average e-mini futures rose 3 points and Nasdaq 100 e-mini futures added 1.75 points. Continuación...