A

Passive ETF Rebalancing Alert

3.65

Derivation Chain

Step 1 BlackRock passive fund inflow trend
→
Step 2 Individual investors' need to track ETF inclusion/exclusion stocks
→
Step 3 ETF rebalancing pre-alert service

Competitor references

No usable source links are available for this idea. Its signal notes and scores need independent verification.

Problem

When global passive funds like BlackRock rebalance, the inclusion and exclusion lists are only disclosed after the fact, causing individual investors to receive the information 2-3 days later than institutional investors. This results in missing the average 3-5% price surge following inclusion announcements, or holding excluded stocks at a loss.

Solution

Analyzes rebalancing schedules and criteria of major global ETFs (MSCI, FTSE, S&P, etc.) to predict inclusion/exclusion candidate stocks in advance, and sends alerts via KakaoTalk/Telegram. A historical prediction accuracy dashboard builds user trust.

Target: Individual investors aged 30-50 with portfolios of 10M-500M KRW (~$7,500-$375,000), focused on semiconductor and AI themes
Revenue Model: Premium Subscription at 29,000 KRW (~$22)/month; Free tier (3 alerts/month); 20% discount for Annual Subscription
Ecosystem Role: Consumer
MVP Estimate: 2_weeks

NUMR-V Scores

N Novelty
3.0/5
U Urgency
4.0/5
M Market
4.0/5
R Realizability
4.0/5
V Validation
3.0/5
NUMR-V Scoring System
N Novelty1-5How uncommon the service is in market context.
U Urgency1-5How urgently users need this problem solved now.
M Market1-5Market size and growth potential from proxy indicators.
R Realizability1-5Buildability for a small team with realistic constraints.
V Validation1-5Validation signal quality from competition and demand data.
N=.15 U=.20 M=.15 R=.30 V=.20

Feasibility (66%)

Tech Complexity
29.3/40
Data Availability
17.1/25
MVP Timeline
20.0/20
API Bonus
0.0/15
Feasibility Breakdown
Tech Complexity/ 40Difficulty of core implementation stack.
Data Availability/ 25Practical availability and cost of required data.
MVP Timeline/ 20Expected time to ship a usable MVP.
API Bonus/ 15Bonus for viable public API leverage.

Market Validation (54/100)

Competition
8.0/20
Market Demand
6.2/20
Timing
14.0/20
Revenue Signals
10.5/15
Pick-Axe Fit
10.5/15
Solo Buildability
5.0/10
Validation Breakdown
Competition/ 20Signal quality from competitor landscape.
Market Demand/ 20Demand proxies from search and mention patterns.
Timing/ 20Fit with current shifts in tech, behavior, and regulation.
Revenue Signals/ 15Reference evidence for monetization viability.
Pick-Axe Fit/ 15How well the concept serves participants in a trend.
Solo Buildability/ 10Practicality for lean-team implementation.

Technical Requirements

Backend [medium] Data Pipeline [medium] Frontend [low]
Dashboard