Flexible Sigmoidoscopy. Flexible sigmoidoscopy lets your doctor examine the lining of the rectum and a portion of the colon (large intestine) by inserting a flexible tube about the thickness of your finger into the anus and slowly advancing it into the rectum and lower part of the colon. Unit trust fund fact sheet for Long Beach Flexible Prescient Fund. Latest NAV, fund objectives, up-to-date performance stats (investment returns), top holdings and much more. FundsData Online provides consistent and comparable data to professionals and retail investors. 30 Jun The Long Beach Flexible Prescient Fund is an actively managed portfolio which aims to provide real long-term growth in capital. Investors should note that a flexible collective investment scheme can hold any combination of shares, bonds and cash, as well as invest up to 25% of the portfolio in foreign.